Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1460cf961fb0292…

MALICIOUS

PDF

83.3 KB Created: 2021-06-03 18:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4ab7ce81e69c70d6442bfff0710ddad SHA-1: 7e3105b39a65a60b55fea2dc5efa4a16b19bc99b SHA-256: e1460cf961fb0292032e11aa0216d0fd9ebcb7705389515dbf2aed3249f13c57
194 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/pbw?utm_term=fastlane+road+to+revenge+hack+mod+apk+download PDF link annotation
    • https://tonibefep.weebly.com/uploads/1/3/4/5/134585532/04b7d3d5b1532d.pdfIn PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/tawugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_601f38a164104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_60373d5beba64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_604465b01b657.pdfIn PDF document text
    • https://nitagupivef.weebly.com/uploads/1/3/4/3/134342099/zagakiw.pdfIn PDF document text
    • https://powonevupurig.weebly.com/uploads/1/3/4/7/134704952/zopare.pdfIn PDF document text
    • https://rolivexume.weebly.com/uploads/1/3/0/8/130873784/1a94ab3e292c.pdfIn PDF document text
    • https://sovewepipofev.weebly.com/uploads/1/3/4/8/134846449/xarezilagazan.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/sonizemorikas-xafupe-razirupusadat-febefulu.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/6057327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408464/normal_5ffc6e54377f3.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/c7677d1.pdfIn PDF document text
    • https://wemavejuza.weebly.com/uploads/1/3/4/6/134689468/romilevades.pdfIn PDF document text
    • https://pamumigupoxip.weebly.com/uploads/1/3/4/6/134614169/9318435.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/883808a76c101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_5fd1d6655f547.pdfIn PDF document text
    • https://xovaxavirot.weebly.com/uploads/1/3/4/8/134853903/xoturowuliwulavag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488322/normal_5febdcab2661c.pdfIn PDF document text
    • https://sijilosak.weebly.com/uploads/1/3/4/4/134476358/mipuduwufizeri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474445/normal_5ff32ca2ed1e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144511770/55495679385.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/f/20626240433.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_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 5656 bytes
SHA-256: 50fe086cd1dc684de8ca379d497d1e0c089b75ea92c6068571ed9934246be040
font_01_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 16204 bytes
SHA-256: 3f1ac79740070bbc9c7b822f029149e8be630154ff3a9bcf38b7fe478ef72f39