Malicious PDF — malware analysis report

Static analysis result for SHA-256 6150d0afd5eed6a5…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 17:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 648fdad833ca7ad6904c6285cf7b3d41 SHA-1: 350551c076c93791384bea8f0b8ebe39aadb39f3 SHA-256: 6150d0afd5eed6a55ac04c58126659d9d905d2e178fb755d22bd4b3bc1cb5aa3
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/award?keyword=raizes+do+brasil+santa+cruz PDF link annotation
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/3411787.pdfIn PDF document text
    • https://sojekaga.weebly.com/uploads/1/3/1/0/131070529/4625085.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/dVPhchb/88448918812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448094/normal_6007d8c1aedd0.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/geicegh/nimorasomabuf.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/Uiazkje/shake_shake_shake_tacoma_gluten_free.pdfIn PDF document text
    • https://jajugodi.weebly.com/uploads/1/3/4/9/134902248/tevetup.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/velewafogaxoranug.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/jcNGjg7/xaxikakerup.pdfIn PDF document text
    • https://bowemubunewoseg.weebly.com/uploads/1/3/0/7/130739536/352bf5648d2c.pdfIn PDF document text
    • https://jerepubiz.weebly.com/uploads/1/3/1/6/131606505/84a4cd6659187.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/bEgfR8T/41772981459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xisefowu/bobenitos.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/bad_genius_sub_indo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/jusuwejonugiz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 5132 bytes
SHA-256: 4d6e08bd27cab293842bf3e634a319c69aca96b341f2219e69e7fbb41cbdb62a
font_01_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 10872 bytes
SHA-256: 13beefc91f29be92a284e76da23afdfd402bed6ce3b4541919e0468511a7cdac

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