Malicious PDF — malware analysis report

Static analysis result for SHA-256 52efd55664a99756…

MALICIOUS

PDF

66.5 KB Created: 2021-04-01 22:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 632b64b2b6dcbe55c90c23b5087626c9 SHA-1: b85b7870f5d8971eb34cafb1622086144f3a8b14 SHA-256: 52efd55664a99756e86c457dd1cfd3290fd0311e167477082baa56789a44f304
126 Risk Score

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 0.9992

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://botokaw.ru/wix?keyword=chevron+carson+city PDF link annotation
    • http://mewudaguzexo.sportsontheweb.net/tutorial_corel_draw_x5_francais.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/agronomic_practices_of_maize.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/suvirusomujaganiwavir.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/wopikonokuked.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/vununal.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/29582504493.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/60736912771.pdfIn PDF document text
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/fipusupurib.pdfIn PDF document text
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/1737215.pdfIn PDF document text
    • https://potemoguzoka.weebly.com/uploads/1/3/4/6/134646314/5296037.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/17981438915.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/egizPgh/zufikibi.pdfIn PDF document text
    • https://xosebabonewita.weebly.com/uploads/1/3/4/6/134613761/a6882d4753487.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/HBOhhha/rifeba.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/wesumazimuzukaxupok.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/hfwYSgf/95657328118.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.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/rakabexozu/69247416688.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_1378f17ac46e4e11adbdfd98327a0e96.pdf?index=trueIn PDF document text
    • http://wokidomogu.onlinewebshop.net/44552092375.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/5568116805.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/a._n._m_ka_full_form.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_5e5e12bfef1a43a4b68233510f0d2f2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/sunotezej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 4924 bytes
SHA-256: 71d873a52b228e802289baf0c2385f2071e7efda39a28635acd20f8a0fafb4da
font_01_sfnt_off0000d99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 10344 bytes
SHA-256: 443e8e04416dd3283d816d1ebbdeb2758ed61c9c8f71e17d1b730dabf76c56ee

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