Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afbfacb108fc21c…

MALICIOUS

PDF

82.4 KB Created: 2020-12-03 08:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 746920ad85a4776ae501333b880be484 SHA-1: 37b06eb9a9e709f2659e968476fcf4ca8d42168e SHA-256: 1afbfacb108fc21c2d54b123a0145e43bae8eaddd0cb91625003f104bc1d75e8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a site for credential harvesting or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing lure disguised as policy analysis tools.

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://trafftec.ru/123?utm_term=what+are+policy+analysis+tools PDF link annotation
    • https://dazowuxope.weebly.com/uploads/1/3/4/3/134319454/455166.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/lufekewizate-dogepuvokupus.pdfIn PDF document text
    • https://fiximumar.weebly.com/uploads/1/3/4/3/134345920/gukew-xipeziw-gegoraru-wusod.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/4207992.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/16333.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/duloxowok.pdfIn PDF document text
    • https://xuzojawuwakobo.weebly.com/uploads/1/3/4/3/134312069/gulagekabifewix.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/f6ca258f80.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/nefubewobozena.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
    • https://uploads.strikinglycdn.com/files/f976feac-8a0a-460b-a407-1c0b239b92f6/wamulalaxilexobaw.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/92727434327.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_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 4924 bytes
SHA-256: 99a258a40452303107d2400a8340189618dfefc6d69834a3fd5423d8a57ec78d
font_01_sfnt_off000109bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BC 10788 bytes
SHA-256: d339f4c04a795126d6b76e0faa271c879e921510651045157caa4027f6c39266
font_02_sfnt_off00012e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E79 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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