Malicious PDF — malware analysis report

Static analysis result for SHA-256 4546407ef37afd8f…

MALICIOUS

PDF

47.4 KB Created: 2020-10-26 08:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6e7f8a634fc67a78e5f7e3af544c6ea2 SHA-1: a98747d0ab38bad3865cc1a35d9bc6f50b895c46 SHA-256: 4546407ef37afd8f27ff80cd21f0d2ab3926307ec810e7753973b92e1ea794c2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=ca+dmv+license+renewal+handbook In PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/depamawo.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/bikabobej_venutus_binokitel_mudejezepoju.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/8861211.pdfIn PDF document text
    • https://pudijubo.weebly.com/uploads/1/3/4/3/134311311/15dd146b8d7e38d.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/8222501.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007969.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007969.bin)
    • https://uploads.strikinglycdn.com/files/a343685e-4cf9-4637-bd0e-31ac6ae767ad/93711286941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc226735-2198-4876-b00a-663b73efc007/bipipob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde7766e-3a19-493c-8678-e470f4b680e7/zojezufikenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7225a759-0740-4875-8635-e9ca9a9cda17/behringer_q502usb_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30b8dbd-74d0-4675-b983-57a6eb6b7ee5/farodas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26674fab-a699-4493-9193-4de0f3e5f1c9/wemopovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9481/1836/files/fexadugolitixijurivil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/shukla_yajurveda_kanva_samhita_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4173/8911/files/pokemon_platinum_gba_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7834/5402/files/daxuwiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/sniper_fury_mod_apk_data_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69f66b2-3311-47c0-ba7e-66c9ad21b6ea/84465664394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111a58a8-9988-4ad4-a7a3-de45fcbf09b7/sakilulonarajavib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a8f32d-a4e9-4377-811f-c237fa6cb788/giwatelanupofiwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dec0038-7019-4df1-a038-679ba90308d6/timofifon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30e884d-c352-4646-b8ab-e367b3adeeda/kepujixojasil.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 extracted file (font_00_sfnt_off00007969.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 5440 bytes
SHA-256: 8e051dc74d289b3d2580f0526595a80cebe7bb72e730f4118ce52cfcddfc3347
font_01_sfnt_off00008bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC9 10848 bytes
SHA-256: c11a2425bc1f251a1d25172080f11f8f82d67e3f1ea996202dd71cdd92b909fb