Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1fe277a9103c94…

MALICIOUS

PDF

70.4 KB Created: 2021-02-14 17:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 30e07af921ec620cf755e54ed78a2a92 SHA-1: 721b3e8755a7ba0a7190ee71c4e9eae35579ab6d SHA-256: ae1fe277a9103c94c53d9c3aab7d0a57cb818f32f77ac70ea169c49d4eae1d43
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely intent to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=clear-cutting+tree+definition PDF link annotation
    • http://rewita.fun/gameloft_java_games_cheat_codessj346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460466/normal_6004b2f218277.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/budalozopobob.pdfIn PDF document text
    • http://websporizle3.com/druid_archetype_guide_pathfinderfuk5j.pdfIn PDF document text
    • http://mirror-x.org/5294362076kg36m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_6007a38f040ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fceba1abd9b0.pdfIn PDF document text
    • http://delayikapy.xyz/zafiweguwigujomoramabmo7qg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5feb9e961f74a.pdfIn PDF document text
    • http://normal-id.com/151006523997ubw.pdfIn PDF document text
    • https://fapudajom.weebly.com/uploads/1/3/2/6/132681453/sanoxepiwamepe-gitepiguk-rurijoj.pdfIn PDF document text
    • http://bonboxstudio.com/99193439586mdjg1.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/9e52b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_5fe5b4eb8702a.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/kemidepenora.pdfIn PDF document text
    • http://onlinesos.tech/chhota_bheem_race_game_hack_apkwtwyj.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_off0000d6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AA 4948 bytes
SHA-256: cc4f3321fc1c8193db1d428380b5004a75c42b5f2c7948fc82776916c4c10384
font_01_sfnt_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 10724 bytes
SHA-256: dc2e930eecaa1353bf678e3f1203c38e4100d7ed41df9125407d9066cccb8330

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