Malicious PDF — malware analysis report

Static analysis result for SHA-256 043acf3c61cc8c50…

MALICIOUS

PDF

117.1 KB Created: 2020-10-20 04:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d18e6b3dce802ff706675394a0e3e8b8 SHA-1: 3b49b7d14060335e1bac8b4221d3ef01bcf72cb9 SHA-256: 043acf3c61cc8c50dea0b3f5a5cc286de7b9d2901028efb0a3b969fd13c0d59b
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to external resources, many of which are hosted on disposable domains and appear to be part of a link farm. One prominent link directs users to a URL associated with malicious redirector infrastructure, potentially leading to malware downloads. The document body, though heavily obfuscated, contains text related to 'dance school stories mod apk' and a URL, suggesting a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=dance+school+stories+mod+apk+1.1.10 In PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/dufegozaliv_gazawibenasa_viguvupukuba_xafamogo.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/2122197.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/kurutos-zasofu-vazap-gogajeguvu.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/2328078.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4752109.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/2836001.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c76e1293-c6d0-4c69-aa91-e66c4c7ba20b/tovajorowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5fc15b-951e-4267-8e26-d1de18736dd2/pokemon_ultra_moon_walkthrough_bulbapedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1ae80b-ecd8-48f5-81b3-76eb1cd4f98a/41071001256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4545a8-9e21-4aed-bde9-3169ba148164/xidatadajanoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57144ce0-33c9-4e46-b579-cbd373347afa/14694115642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0551/7213/files/wabetatefutagagowapoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5627/files/five_nights_at_anime_game_play.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8265/4919/files/digiorno_stromboli_cooking_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8734/6846/files/cumtube_apk_for_firestick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9339/2037/files/10702085706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3785/0262/files/vonijidobipogaxematerija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3180a0-930e-4d67-9155-a319604dacf4/45908526542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9471b695-6d54-45af-b7b0-a9ebb6546c36/temazerefeminatixito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d415d9-2826-4fa4-b539-7c771d5b3e6e/rodisegem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3675a7c0-9316-4da8-92f9-45f10180dbb2/xenuseri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d5cced-8a33-45c7-9e0b-b6420f45c366/gupenatuveruf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 26420 bytes
SHA-256: c01f950e60c3124381766f15fadb62e86f8c1ff1c2377297cc9da5662b9d81e6
font_01_sfnt_off00013445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13445 5388 bytes
SHA-256: 53f4abd921c299943475597396d79600ef4e84a74cb0942f2492532e91c420b4
font_02_sfnt_off0001465d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465D 5924 bytes
SHA-256: f1d735987a6ee626a2a06bc21b4c1ed581ae866a04bef254224edd6c8a37f710
font_03_sfnt_off00015860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15860 5464 bytes
SHA-256: b8cbc999fe0efdc3d0538c2ff25765b1ec0c3ab9b5b6a4e3326c92550d7c6e72
font_04_sfnt_off000169bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169BD 15532 bytes
SHA-256: 5b18d01c9e1cdb21b18fc5b21ccd6a6a2ff9ed0af125c1dc3dea7cfca7285e27
font_05_sfnt_off0001990a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1990A 17968 bytes
SHA-256: 0580bfdceea4d92b00292aeaac08029ac96f33e15a435ff313cc9be51b03731f
font_06_sfnt_off0001b451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B451 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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