Malicious PDF — malware analysis report

Static analysis result for SHA-256 31117c694e3034df…

MALICIOUS

PDF

79.7 KB Created: 2021-02-27 13:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3c3a85728c51a8b58aadc0c860eee09c SHA-1: 7e9c0267381c4e3520b12184c1906151a7140bdd SHA-256: 31117c694e3034df669ffd52fdeec65775f9480e1a2d92252ba2c37d8580acb3
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to link farms hosted on disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or spam campaigns designed to redirect users to potentially harmful content.

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://jacksth.ru/award?keyword=alan+watts+quotes+on+love PDF link annotation
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/2edb756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419633/normal_5ff7ab3c371f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5fee231eb582c.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/1ad4539530809.pdfIn PDF document text
    • https://jidisoluko.weebly.com/uploads/1/3/6/0/136097174/dekokofamevozo-vukipawaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_6035a5ed31902.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/7bc522.pdfIn PDF document text
    • https://reravonox.weebly.com/uploads/1/3/1/8/131856904/sunulerivijuzopev.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/xulom.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/2268118.pdfIn PDF document text
    • https://sovezoku.weebly.com/uploads/1/3/4/7/134731827/peboza-raket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fe9b1760d9e7.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/fukepez/lawilel.pdfIn PDF document text
    • http://rajafebinolug.epizy.com/75655140656.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/94983218663.pdfIn PDF document text
    • http://konevimojo.epizy.com/adobe_xi_pro_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/behavioural_competencies_questions_and_answers.pdfIn PDF document text
    • http://sozejegisiwex.epizy.com/router_template_guide_instructions.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_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 4852 bytes
SHA-256: c28d2d2bef8e4544775bff423d6128d748e141279085eeaf3e7238860e6167fd
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 10364 bytes
SHA-256: 9fde346b9c61a2b00826bcc6c473d8a959442d2ae07684e059e684f6e5ab5d96

Open this report in the interactive analyzer, or submit your own file for analysis.