Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fde2850fd74454…

MALICIOUS

PDF

79.8 KB Created: 2021-03-25 15:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab30cac830777e8950a6fae77999dee8 SHA-1: 503464b4017cc563e53cd8075256f48eae880309 SHA-256: 32fde2850fd744547eedb5cc26bd2a8f72ca629563363f74032ec7aabf727f40
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 0.9998

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://dafemum.ru/award?keyword=fistula+perianal+causas+pdf PDF link annotation
    • https://cdn.sqhk.co/vifejoneses/ijgiepO/menovow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5fe1c19f55e00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5fddd915435f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5ff0bdd614e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_60178631df2d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fcf49eae9429.pdfIn PDF document text
    • http://openlait.pro/how_to_restart_adobe_trialcaf09.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/hjrjdjc/51605991602.pdfIn PDF document text
    • http://nout-prodat.site/futizugufatufibixobxvd40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fe4104c7f904.pdfIn PDF document text
    • http://successinyourlif.website/bigemekupiwedowebakubius80y.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/hiihhoi/23741089036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6033d0b8ec202.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/57100381841ei5fv.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/kjgjhhb/oconnors_worcester_stabbing.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
    • https://s3.amazonaws.com/veraxawewib/63291512144.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/bushmaster_xm15-_e2s_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/libupir.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/appareil_digestif_du_poulet.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/java_swing_full_tutorial.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_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 4876 bytes
SHA-256: fe8b4ff267385121007ad0f9f84ffe63c9849da6e0dcc82986a9d0580117516f
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 13952 bytes
SHA-256: 89c5fc721c1e93773aa2620ee43e9ca98c9a9cbe6a86b2f72014d4768a853086
font_02_sfnt_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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