Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff75aaea545c496…

MALICIOUS

PDF

75.8 KB Created: 2021-04-09 21:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c50b208bb374fbcf083a635016fbd7fa SHA-1: 48abc94a3e24846ad1e79e34c16b93361bc91622 SHA-256: bff75aaea545c49649bbc6c4d78b41344ce5d3b13afe2c9d1a6654ed00a40f90
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=hasselblad+mirrorless+price PDF link annotation
    • http://uscovidcharts.com/snow_drift_fences_in_wyomingnshpa.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/fried_green_tomatoes_book_summary.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/mubofa.pdfIn PDF document text
    • http://pochta-24.cc/fifajesinazibax48hn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_604aee963d900.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/90100887459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6021282f109fe.pdfIn PDF document text
    • http://kyrgyztours.com/zaborogasitefakanukawezotdk4wt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_606e67547b714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490263/normal_5fca9c72a9e9d.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/39189624153.pdfIn PDF document text
    • http://esagafow.fun/70956078473kn97u.pdfIn PDF document text
    • http://bewudewumit.sportsontheweb.net/27956341678.pdfIn PDF document text
    • https://worofinuwur.weebly.com/uploads/1/3/4/5/134582463/rujovopopev.pdfIn PDF document text
    • http://elerctum.org/34734088531yd9bc.pdfIn PDF document text
    • https://libakitaxejadeg.weebly.com/uploads/1/3/4/0/134096258/vesogemifo.pdfIn PDF document text
    • http://idealicait.website/bosiruredenijadagomvgd50.pdfIn PDF document text
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/285acb.pdfIn PDF document text
    • http://halfraire.xyz/nudupejedix0168.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/d3827a5f-4cfe-44a0-bf33-1ac13a897e41/about_ie_irodov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd62543-76e1-4a25-a876-ca92f8e01484/54895208241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937b51f0-d8ee-4841-a3a8-1705d8da2e6b/logitech_z_2300_service_manual.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_off0000ea61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA61 5320 bytes
SHA-256: f00f783c23e6bbc842c20306fb761f95c34016a7707b73ea016e07e7c157ef33
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 11216 bytes
SHA-256: e237f4e4c78be15941d5cb47b9a06b9ce429347b7d497b916796fc331a5c0ac5

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