Malicious PDF — malware analysis report

Static analysis result for SHA-256 430cd7837d7fe398…

MALICIOUS

PDF

73.0 KB Created: 2021-02-25 05:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a59a7fdfd811814a4a1c3bb22205d72c SHA-1: c1859bcaf6246a2f4a365dd3ea6caf9f8041d41f SHA-256: 430cd7837d7fe398ee97952efc53ae9b8f6ce59e4553f1151169d002169e01be
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/award?keyword=can+i+renew+my+permit+online+mn PDF link annotation
    • http://zatawonilar.iblogger.org/lomoxegi.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/12931.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/dufufafubuzumusalb21g9.pdfIn PDF document text
    • https://jezexubuxerib.weebly.com/uploads/1/3/4/0/134040893/jefuxasuki.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/bomilazido.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/kanas-sovaromalapego-zonukukiwawix-dagujaporega.pdfIn PDF document text
    • https://wazalopa.weebly.com/uploads/1/3/0/8/130814586/6c7b77.pdfIn PDF document text
    • https://fububekamuko.weebly.com/uploads/1/3/3/9/133986391/0143f39fc01.pdfIn PDF document text
    • https://paguvobidelovug.weebly.com/uploads/1/3/2/8/132815355/6448047.pdfIn PDF document text
    • http://vir-tus.com/diamond_buying_guide_chart9a0hk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fanedabomo.epizy.com/camping_merit_badge_workbook_answers.pdfIn PDF document text
    • http://nozovov.rf.gd/chogada_tara_song_video_full_hd.pdfIn PDF document text
    • http://nupenujopufidi.epizy.com/is_devil_wears_prada_on_netflix_canada.pdfIn PDF document text
    • http://sebavorapu.rf.gd/90522238598.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_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 4888 bytes
SHA-256: 5356bb0a231e7215a4bb24c477c017f391217f5e3cd6d0729f3548ae8e3145c7
font_01_sfnt_off0000f246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 10784 bytes
SHA-256: 7872aa7462463cbf2642d1466b98eecd36c055d4698337384f257042c2eda01c