Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2264615c3e91be…

MALICIOUS

PDF

79.7 KB Created: 2021-04-04 19:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8918f97ab1aec6084ed8be34166ae2d9 SHA-1: 7a9933d60559c7a1bd04bc6bd3a82a0a5783f290 SHA-256: 0b2264615c3e91be25a057bf34567c91bb6f8c85fee27579f2fdb3d1306e26f6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external domains, with heuristics indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common attack pattern for initial access via malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fokemale.ru/award?keyword=plan+center+parc+ailette+pdf PDF link annotation
    • http://wei-nmvc.com/muburufebadupitupiwunpt4y.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/Syhi3xF/percentage_calculator_math_papa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_60650d112f7a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501233/normal_5ff8d3d7a2303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_60411bd8a781b.pdfIn PDF document text
    • http://umkatrade.ru/903462455939g88h.pdfIn PDF document text
    • https://cdn.sqhk.co/guxifunuris/ai4ibrU/xuliditatebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_6060fa9b52b89.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/biiSih6/kekanubevavugobul.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/lozutuxosonulenyb6.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/hjiN5gc/crashing_season_3_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/hhc5gd8/80733572518.pdfIn PDF document text
    • http://marketitaly.info/mujumurez5n5tu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_601502b510215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_6051974382eab.pdfIn PDF document text
    • http://alex-chekalev.com/11265407544a7ttu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_60472bdd34de1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5ffe4cd0dc7fe.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/fdihhjd/68208418824.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446645/normal_6006436f69041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_603bf075b2db0.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/eDgj5ib/puzzle_100_level_24.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/oewX6jh/download_rolling_sky_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_605b8f45bb72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_6027e223cabe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_6019d35966cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_603709d821b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_60220db58652c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 4972 bytes
SHA-256: 0d80059c3fe501ffb0e8c4067a99b1a5846fd8311e9dfadae12b1ef1bb5da942
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 13696 bytes
SHA-256: f9621d17ed753b1bf12a13f3aff3c2ada788855d46a890a3a5f9dd2fc1e7e7b2