Malicious PDF — malware analysis report

Static analysis result for SHA-256 952b2f04a12f8aab…

MALICIOUS

PDF

84.5 KB Created: 2021-03-17 16:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f5a2ec79d9ee1ec08b5c31f8afd968a0 SHA-1: dfb3c26a67e38289a0ee7920d0bb3a3c7b5a1e79 SHA-256: 952b2f04a12f8aabed2067a7982f2d37df16b0518559283c83a43b1b965a4fe8
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=vocabulary+workshop+level+b+unit+11+answers+choosing+the+right+word PDF link annotation
    • https://jewotefajasofu.weebly.com/uploads/1/3/2/7/132741420/3564677.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/how_to_reset_beats_powerbeats_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_60081dd6c9505.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/2974427.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/ludivir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_603d10dd43888.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/sumadazedibidemoju.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/insignia_ns-55l260a13_manual.pdfIn PDF document text
    • https://povejuzulegaje.weebly.com/uploads/1/3/5/3/135301343/vobirajeloduf.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/1430062.pdfIn PDF document text
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/fopagafimowo.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/fetal_development_month_by_month.pdfIn PDF document text
    • https://detaseruwef.weebly.com/uploads/1/3/0/7/130740376/cc7b55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_cf0a0693bfe14b0098b0f9e711526c31.pdf?index=trueIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_c3a95bbd43244c0788cfa129d885e847.pdf?index=trueIn PDF document text
    • http://mojozore.myartsonline.com/how_do_i_see_my_pc_specs_windows_7.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_98fce8d97ed14d46a847adfef1408e96.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_56de2b152da74486b1e4c89278ecfd78.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_34905dd61d7f4290b172c577be6247fa.pdf?index=trueIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/nonigunedizumizexipono.pdfIn PDF document text
    • http://xonolori.atwebpages.com/bakery_equipment_list_and_prices.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_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 5808 bytes
SHA-256: 19fcdb51e8d38a5526f22575b96671f8cac7abe591558b681b6fe67d48ee96e7
font_01_sfnt_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 2932 bytes
SHA-256: 3edb5fbecb7805b84f6a6b357472a4861f4147c82f380745199a503e2ceb8109
font_02_sfnt_off00011ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE5 11412 bytes
SHA-256: 4a279d6d5ac0efe306c48289afda4b4935681be000c55743ecd40a98d777f1fb