Malicious PDF — malware analysis report

Static analysis result for SHA-256 22693249d1ee3d41…

MALICIOUS

PDF

78.1 KB Created: 2021-02-23 00:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3fda5b19675aef596d4f9b2a0d43b823 SHA-1: 2ec907f265309528a3d2e367f07a0a9c7623be25 SHA-256: 22693249d1ee3d415c32631737d80f839b6b0c60c69dfbb47c8c084b71751563
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and extracted URLs suggest a lure to download content, potentially leading to further infection. The presence of external URIs and link farm heuristics further supports a malicious phishing or malware distribution scheme.

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://seumenha.ru/strik?utm_term=descargar+biblia+cat%25C3%25B3lica+de+jerusal%25C3%25A9n+gratis+para+pc PDF link annotation
    • http://termometr-medikal.site/master_the_boards_usmle_step_37u7y0.pdfIn PDF document text
    • http://smartline58.ru/retovawv5gd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_6017a4344deac.pdfIn PDF document text
    • http://francobusiness.com/60106996040ga2r4.pdfIn PDF document text
    • http://rubisteq.online/bhairava_dweepam_telugu_movie_mp4_freelp9fg.pdfIn PDF document text
    • http://tesar-krd.ru/fanumakusafofadaklwt.pdfIn PDF document text
    • http://onlinekartiadesi.com/song_of_solomon_kjv_50o3t4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5ffbece57240d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5fc6b2c14c4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_6016ac92a0435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fee7b6a0ed73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416923/normal_6001668177e15.pdfIn PDF document text
    • http://triple-doska1.club/pokemon_x_and_y_walkthrough_guidelzu0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_6012933e0fd37.pdfIn PDF document text
    • http://nowuweg.iblogger.org/futakepolixizip.pdfIn PDF document text
    • http://svoytrylend.xyz/675224041551f1os.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/gubun.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/amplifier_mp4_song_free.pdfIn PDF document text
    • http://tusibav.epizy.com/sidib.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/sazikumogesubub.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/spontaneous_bacterial_peritonitis_treatment.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_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 5736 bytes
SHA-256: a0dbba775330271942a4b27ed01739fa645668c13e14db394e27b0464202c261
font_01_sfnt_off00010004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10004 12444 bytes
SHA-256: b1e4989c754deef7b11fde16ca3f1841b76246a338473ac5cd885665e9d99fa0

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