Malicious PDF — malware analysis report

Static analysis result for SHA-256 265bfa34d7b5a2a6…

MALICIOUS

PDF

70.9 KB Created: 2021-03-05 01:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4260e2d3b86055f94e93921dbc6d1bd2 SHA-1: 8f2318c8754a93dc1d4582f9d36812ae32fe4d5b SHA-256: 265bfa34d7b5a2a6626453180a0d0246ec1c7bb731337d70bd0134c34f3a812f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to external sites for malicious activities, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the link farm heuristic strongly suggest a phishing or malware delivery attempt.

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://lozipotod.ru/wix?keyword=mineral+quiz+study+guide PDF link annotation
    • https://cdn.sqhk.co/zoluxoni/f3NUGe5/falling_for_christmas_full_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/AjghcVy/ryan_s_world_ninja_warrior_shadow_box.pdfIn PDF document text
    • http://tawiwadebez.iblogger.org/92446203137.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/bike_boy_photo.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/ib79J0O/zinitola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_60288caf53400.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/uwHiDgg/jungle_survival_games_online.pdfIn PDF document text
    • http://craftsmansmetics.com/mechanical_design_engineer_jobs_in_chennaic2u9z.pdfIn PDF document text
    • http://skout.tech/modul_akuntansi_keuangan_menengah86rzy.pdfIn PDF document text
    • http://tihefers.online/87661221861d0b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_602a0a341fca7.pdfIn PDF document text
    • http://artdebug.site/xosijuxutoriwujexedefi6any.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_23c2d05c792346a6a90609226afdf7e6.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_28c0d4c18a6045dc8ed5c86a9d5471ec.pdf?index=trueIn PDF document text
    • http://lodibusalibazi.epizy.com/10394984377.pdfIn PDF document text
    • http://bobuvuj.rf.gd/how_can_i_improve_my_english_speaking_quora.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_308e93d505294023b6cfcc469eb31ff5.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_daa75208db3c44c5b3030825cdc38ba8.pdf?index=trueIn PDF document text
    • http://fewufewidi.epizy.com/36322756128.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_e01b4b656f8c44d0b05f04331c6aa477.pdf?index=trueIn PDF document text
    • http://nasuxenabo.epizy.com/luxagageziguv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 5276 bytes
SHA-256: b7c37b4adbd3b9e044d475db99c2461791ea6cc6979f5b81324025e74fc766ed
font_01_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 10132 bytes
SHA-256: ca77efa3bf8d21138e7c57c2323de08673f1c08673685e24e33b53241182cebb

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