Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c8e72859f74e2d…

MALICIOUS

PDF

87.6 KB Created: 2021-04-04 00:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 793ff51f3332db48c2497eedc43e15b5 SHA-1: 5b99e9f22893490bde3e388d0eca4a79728ee2e1 SHA-256: f2c8e72859f74e2d8bd5637887642a86136cd824218982daf5b8a12cc215bc92
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/123?utm_term=chocobo+racing+for+pc PDF link annotation
    • https://sipesavuw.weebly.com/uploads/1/3/4/6/134697333/06a9531ccc7.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/lowakebuje.pdfIn PDF document text
    • http://latuha.com/465177791380l8b8.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/lewezepopobov.pdfIn PDF document text
    • http://creditscorerepair.info/what_episode_does_the_war_began_in_naruto_shippudendy5d8.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/lutoxesoxovudorupi.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/fgfiiij/exploration_definition_environmental_science.pdfIn PDF document text
    • http://frut-tree.site/sewidewelejitawoges4cqtz.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/hevAhdg/74398643270.pdfIn PDF document text
    • http://nubolutlion.xyz/98526923797ub039.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/how_to_use_sharper_image_binocular_camera.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/divarato.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/gjeV7gf/kid_city_gaming_madden_20_franchise.pdfIn PDF document text
    • http://freehookup.xyz/tafadozewixobajinezorexal58qzq.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/3718373185.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/UiejaHX/59318602217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c38562-26c0-4431-a5b9-ba935f91d097/sefidujeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a19ab5-5755-4b7f-b20a-5dce87535323/slaves_to_darkness_start_collecting_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d25711-7e6d-44dc-8c70-8c92ef74c65e/13790208548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ff8d90-d0ee-419a-b1db-b8a849300178/pretty_little_liars_episode_21_season_1.pdfIn PDF document text
    • http://segimoto.myartsonline.com/langman_s_medical_embryology_11th_edition.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 6316 bytes
SHA-256: 2b1391a791d4964327b76d0078a10cbc62e1c9568fc7de862ebbfe341447e4b5
font_01_sfnt_off0001166e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166E 5112 bytes
SHA-256: ab170170ad58e01a62f01e1224cc53774ac4e1a7f01a05a20e96e4c223888a5a
font_02_sfnt_off000127d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D1 11548 bytes
SHA-256: 8196d8b76c1150288f85e730cbd35310e4a675a0c30ac665c0da1d8aef6ec690

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