Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06695145764c45d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 18:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1454775d301b440f2a696f6ea51177c4 SHA-1: 92dc1d748093bf58911adbd3fb478ec1acbad255 SHA-256: d06695145764c45dd3eae9d2cba358d26edddf18a3ca3da45f640869fffe4722
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a product manual, likely a lure to disguise the malicious intent.

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://zajinet.ru/award?keyword=avent+3-in-1+electric+steam+steriliser+manual PDF link annotation
    • http://radanews.site/disney_castaway_cay_map8v2t2.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/hs3jjn9/amc_theaters_movies_white_marsh.pdfIn PDF document text
    • http://jsexj.fun/are_masks_required_in_home_depotgdwto.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/jovofijo_jewir_ponigorabonamu.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/bjeQNjd/32361370311.pdfIn PDF document text
    • http://bizegusesugusus.iblogger.org/2799288889.pdfIn PDF document text
    • https://fatomokoke.weebly.com/uploads/1/3/4/0/134098041/1894053.pdfIn PDF document text
    • http://autoport76.online/83094673288sepdd.pdfIn PDF document text
    • https://waziketezu.weebly.com/uploads/1/3/4/6/134648841/4771790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_5fdba93842d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_602e9cd27dea6.pdfIn PDF document text
    • http://andyhong.blog/best_hero_archero2au5y.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/hrhfSgi/61383531464.pdfIn PDF document text
    • http://bonus332.site/boswellia_serrata_reviewfwbj2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_60344a7e67bc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekofixas.rf.gd/asbestos_sheet_disposal_cost.pdfIn PDF document text
    • http://bividit.rf.gd/32869816208.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/gelaxobotakutiwizo.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/vojilinokowusesabixutitov.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/australian_cystic_fibrosis_nutrition_guidelines.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_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 5244 bytes
SHA-256: 84e042d308d47f22f6b017cc761d9946e1b39d3c0a104354b360fe69777ff1f1
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10432 bytes
SHA-256: 6d5b24a4e4f96f8a516f03d7bb3756ce4d7891beff11471103a3adcb442747db

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