Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb6b14d85b2e15f…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 23:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b0d152826b48318e7b3916af649da48c SHA-1: 36ebbb546d45d74e1270e912ad2171e0fda0ffb4 SHA-256: 8bb6b14d85b2e15fc99306a354e78e2b55a6ed09cd3bc239ddac4ba41d4b54d6
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 0.9996

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://gimoguvi.ru/wix?keyword=iwata+airbrush+cleaner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366959/normal_6016aaf111b28.pdfIn PDF document text
    • http://igonlinesupport.com/7998468400830kxn.pdfIn PDF document text
    • http://wrinklestiltskin.com/gta_4_cheats_pc_full_listg4rz4.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/hLVUv5O/42469090029.pdfIn PDF document text
    • http://coolvdomaion.online/angular_momentum_in_quantum_physics_biedenharn1tbq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5ff788ee5fdfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5ff7f02854e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_600ce46a11319.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/9jfPgfN/politics_and_prose_washington_dc_events.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480889/normal_5ff4a7d8a4447.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/h8hIZOY/cake_decorating_kits_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6047e54944894.pdfIn PDF document text
    • http://podcard2020.site/community_trust_bank_lienholder_address8hrfg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vovijez.epizy.com/namaz_ka_tarika.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_ea0559f604704a02a8de82e89db82c07.pdf?index=trueIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_a90c4a3be09d44b1b3fdbdd64abe5bb2.pdf?index=trueIn PDF document text
    • http://likefiradoweze.rf.gd/citizenship_in_the_community_packet_answers.pdfIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_41f4778f024e49b1996496ee657da380.pdf?index=trueIn PDF document text
    • http://figapow.epizy.com/xafiriraweg.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_44d8d728c72940e99c3ca7adf2548730.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_65bfd74f68534495982ec4e074c91883.pdf?index=trueIn 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_off0000d396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD396 5056 bytes
SHA-256: 23d79e2329ef3566e86936b467a85644c9d6b5e7cc36a10a74329e0799ef1241
font_01_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 9380 bytes
SHA-256: 13af8b8606d1b05f8015c983abbc7a01b106a3857c378a56cad0b186560a5a0e

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