Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de6bd70be8bbd2c…

MALICIOUS

PDF

91.5 KB Created: 2021-02-28 18:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2009c66ea0c1195bf3041f2fc076ed8d SHA-1: 0172c6ad5c844594f16ac3275753cbd30b31b8e5 SHA-256: 8de6bd70be8bbd2cfd37eb8ff53d964b3101145e1c9ada304fcb0be13b06089c
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://botokaw.ru/award?keyword=weber+grills+natural+gas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421767/normal_6002ab4b18408.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/gdvxRld/35298307937.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/iogdhg9/95804070592.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/fhiHjid/slifer_the_sky_dragon_deck_duel_links_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/kUgfgdQ/62341712962.pdfIn PDF document text
    • http://moresukko.ru/gokikozakupqk74m.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/tgckijf/segexa.pdfIn PDF document text
    • http://verification-help.com/c_3d_game_programming_tutorialpanqm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_5ff36485c451d.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/dK8Piau/rush_copley_medical_group_mychart.pdfIn PDF document text
    • http://bestcreditcheck.info/rothys_shoe_size_guidezh2kd.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/30290330690iqx7x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_602d8e5829eac.pdfIn PDF document text
    • http://profaudit32.ru/android_jetpack_login_exampleds4o9.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/wZyjiFV/zirowikoginolivezeletema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fe97296b00c4.pdfIn PDF document text
    • http://bigswinner.space/touch_of_class_bedding_comforters7223g.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/kozewuposoridil/97123242594.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/85451743989.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 5008 bytes
SHA-256: 62d8beb4587308b9f08d3e3bf5a56f72a3137282cc2d64a5b10e3f1c3546ffe4
font_01_sfnt_off000126ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CE 10772 bytes
SHA-256: 378e881020a11c115ff4fe1ee1171a1253ab5000507070c64ef978a8234c38aa
font_02_sfnt_off00014bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF3 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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