Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeb2171d965f54a…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 04:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a25576b1398eac1cf3b8b78edc142424 SHA-1: 129a57e4cbd1bd49a55b14da977baee61c9582ee SHA-256: ceeb2171d965f54ac246932ac2f096535f4244303e82c2a38bcfa8af3b9191df
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'zajinet.ru', which is likely the primary malicious destination. The document body is heavily obfuscated, but the presence of the external URI and the ML detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=what+is+the+major+theme+of+frankenstein
    • https://static.s123-cdn-static.com/uploads/4483336/normal_5fdd77d875cb6.pdf
    • https://cdn-cms.f-static.net/uploads/4370088/normal_603ef09aba10a.pdf
    • http://narosisebono.22web.org/vyapari_mitra.pdf
    • https://cdn-cms.f-static.net/uploads/4379487/normal_604114da75631.pdf
    • https://cdn.sqhk.co/koditisalupe/ji5ihzl/raludizumeropirorefimiwit.pdf
    • https://cdn.sqhk.co/dewufidabo/zYZDUgh/technology_teacher_certification_ny.pdf
    • https://cdn-cms.f-static.net/uploads/4452845/normal_600f4ed43d42e.pdf
    • http://makasef.22web.org/algorithme_exercice_corrig_1ere_anne.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/04e6e3ba-3597-4e7e-8040-26e5ab1952ec/what_angle_is_exactly_360_degrees.pdf
    • https://uploads.strikinglycdn.com/files/90fdc2f3-8e45-4242-aa5f-bb00cbf7ba77/62814700087.pdf
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_534889113a7f43f5b74efd60a2ed7423.pdf?index=true
    • https://s3.amazonaws.com/jivala/sapamonupa.pdf
    • http://zakuvusebaj.epizy.com/undertale_music_sheet_easy.pdf
    • http://kopunumepoz.rf.gd/rededabaxiferurukafebofi.pdf
    • https://uploads.strikinglycdn.com/files/051c16e7-a561-42f7-ba97-6298eba49992/foundation_and_earth_isaac_asimov.pdf
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_e3f728e789d846059cc9a5c8168ff435.pdf?index=true
    • https://s3.amazonaws.com/wunupalezozerud/desolate_game_guide.pdf
    • https://s3.amazonaws.com/wemofodi/mackie_micro_series_1202-vlz_review.pdf
    • https://uploads.strikinglycdn.com/files/c3d78f98-630d-4823-92a3-ca380d44b75a/top_10_lady_macbeth_quotes.pdf
    • http://vitimalu.rf.gd/carnatic_musics_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b22.bin
557a2f63003a41166679ed0e0e7b69ea82c43951d31d8fe012b6d7e3b267721d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 5128 bytes
font_01_sfnt_off00011c76.bin
cce5eab7d02fc02f7057062fa1eaef9d86d6a12b768d92d3f1cc5965734fe03c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 10972 bytes