Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cab8ca8aeb07f8c…

MALICIOUS

PDF

75.7 KB Created: 2021-06-13 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f9d9a9353b0670b4a8b82f19b09a2960 SHA-1: 153335b4dc6e1dbb955ef5108aabe680c076df88 SHA-256: 7cab8ca8aeb07f8cc7122fc680309bfc9f132853a7fd4fd80add33db061e330d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=karthika+deepam+star PDF link annotation
    • https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/9698477.pdfIn PDF document text
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/6193258.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_5fff6d89e22e3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4481994/normal_60b7038273393.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/mupufowagokodag_fegegamozepagup_kidevejatogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fc966e73b81e.pdfIn PDF document text
    • https://sabexinutix.weebly.com/uploads/1/3/0/7/130740027/1882326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_60243a1177e81.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/tawiwesonakaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_5fdbe047c4a91.pdfIn PDF document text
    • https://misekijenag.weebly.com/uploads/1/3/1/3/131380320/3ff1ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://niraxaba.pbworks.com/w/file/fetch/144911991/97381520709.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/bubokapilupezuralofujigoz.pdfIn PDF document text
    • http://lakiluxodev.pbworks.com/f/76473374294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2579ad96-71ae-4ab7-ad25-9dc8de1e4786/rugevab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deab4338-ae1d-4eb5-aa67-85667966b611/zukazu.pdfIn PDF document text
    • http://tefimemovem.pbworks.com/f/homelite_super_xl_automatic_chainsaw_manual.pdfIn PDF document text
    • http://legesir.pbworks.com/w/file/fetch/144700284/2005_ford_escape_hybrid_brake_problems.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144433803/piwugizugavebokevozebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aea0e51-dcd6-42fd-8548-c35ccdf6d16a/can_i_cash_out_my_trs_retirement.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 4772 bytes
SHA-256: c9f3a4e96266681486b88fc049e10abae541b9a6f44fadd53f25c6ebe3e59d77
font_01_sfnt_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 11008 bytes
SHA-256: 087432cd482c1ae177f2ae019de16a5a58ab0050c9256e880dd1ecf0332d1972
font_02_sfnt_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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