Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d38bb7032bf0bb…

MALICIOUS

PDF

81.3 KB Created: 2021-02-22 00:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 99dca7e62034fc94879390ec451ae5aa SHA-1: 40181993985e537168f158ba7c24cc96c6bb9b60 SHA-256: d2d38bb7032bf0bbc1b433e1d8b3684583b1f221644122383484d22c03979ebe
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of redirecting users to potentially malicious sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=sportspower+trampoline+instructions PDF link annotation
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/6730361.pdfIn PDF document text
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/nulevebizagum-xerijozapaba-zejenurivete-bizig.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/638c57.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/224430c52ff6.pdfIn PDF document text
    • https://zipadufemawosep.weebly.com/uploads/1/3/1/3/131398243/wubatumo.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/j71mjhS/85356376146.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/kewukomipajuga.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/bonopulakebu_vobuvupemege.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/2610360.pdfIn PDF document text
    • http://jadenefabive.iblogger.org/counting_by_7s.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/5291209.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/19898941675.pdfIn PDF document text
    • http://niwifara.22web.org/refudeniromogevajusej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sufitinefa.epizy.com/foxitobaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/fifuropimaxevadow.pdfIn PDF document text
    • http://punugituk.epizy.com/boiled_rice_nutrition_information.pdfIn PDF document text
    • http://matavun.epizy.com/navy_seals_movie_songs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 5156 bytes
SHA-256: d99bf1a85d6bdbd8b8731b93d7cf795eb3796ea3732f4394488cea7cb0e804ae
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 10604 bytes
SHA-256: bd29b37c524f812f90ccdef71c8985f52b906d9cbe8e24dd2385f7f770d22f27
font_02_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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