Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef6ea2da8a8801b…

MALICIOUS

PDF

91.2 KB Created: 2021-03-31 16:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d29ccc6d647ce08a8b60cfe597778125 SHA-1: 1a391d91dca5fdced52321d544fb616deafc513e SHA-256: fef6ea2da8a8801be1de269c179d21accd18628e43d6f62f65dfae589ec37972
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'business attire template for id picture'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/123?utm_term=business+attire+template+for+id+picture PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/pjgykjf/cold_war_black_ops_zombies_maps.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/putilobajopaiwemb.pdfIn PDF document text
    • http://nout-prodat.site/droopy_s_guide_to_the_cartoon_networkoj5ws.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/iegiqek/3975504531.pdfIn PDF document text
    • http://xsafak.com/62561608314v36tn.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gibxic4/how_to_draw_monster_high_draculaura.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/bifXMbY/66876322939.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/ashddzz/free_things_on_your_birthday_arizona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_3ed4c7981a0c48d094ac5a1b58b70af7.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_f9fbf2344dcb45ae812e14e460598d24.pdf?index=trueIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_89056de134cb435db125adbe3479d3a2.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_6c5d963ee5a049df8a81ba1a6a513bcf.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_0953ba280b524ae88f3e84163fe22344.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_2cef20b589234c268993736cba0d6a71.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_b7d9876514324467bc9934391be4893d.pdf?index=trueIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_8f71306f6db94375b1ed1aeaa9009682.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_71c51298b44747338a05a3aee5d1bd9a.pdf?index=trueIn PDF document text
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_a5944896661640e3bd74b7eafe0df42c.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_4f113329bcd4489f876713539407a1be.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_ee9e9a9cdc53456bb77f83a88e201be5.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_7a9d51f4cf134946a98edf736f508f21.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_1761917f92e54de398d980c89b246775.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_off00012d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D46 5348 bytes
SHA-256: 608b5886fbf20643049340e020288b8979b4adf3fc110e942b5dd1c1e3bdaa37
font_01_sfnt_off00013f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F61 9308 bytes
SHA-256: 44ca5a82f1e9d280041e9964b45b8e11435303804acedd9f8c741b44ac73e825

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