Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ffa0452f7b6c69…

MALICIOUS

PDF

108.2 KB Created: 2020-12-17 15:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0f8e5e867cb2c4cbc4747f9a7ab89294 SHA-1: 48ff551adef970e7d23e3c45d972b5837c21c24c SHA-256: 62ffa0452f7b6c697019d5d5b68c79aa3c6d8f59bef14e944c6466577ddb7c5b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the document is designed to redirect users to a network of malicious sites. The presence of ClamAV detection and ML classification further supports its malicious nature, likely as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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=is+yeast+a+decomposer PDF link annotation
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/pegixupalis.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/gapololizinigofukaz.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/30d80ce49c.pdfIn PDF document text
    • https://vovejurumek.weebly.com/uploads/1/3/4/6/134644047/a14d0547dc6b449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc27255f81c9a2a0cf1093c/1606578773824/parts_of_a_circle_labelled_diagram.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d2deea4a794d56670281/t/5fcbfa1d978da30c56e7e24b/1607203357860/free_casino_slot_games_for_real_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b7b48139af0376660f60/t/5fd6cf60dca2215260527038/1607913313031/unworthy_of_your_love.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c356a13a450babf351fc/t/5fc16dc23485235c86fcb2a1/1606512066959/32825353028.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/91201620997.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc328402e537a05ef17c917/t/5fc9a73e87b36f46d4fb1e66/1607051070785/jibokukonemaponetujelo.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_off00016ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC7 5228 bytes
SHA-256: ccde33ff9542560843763a4cfef0d0a41922d0adf22edbd0612e867d7f23bbc0
font_01_sfnt_off00017c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C81 11800 bytes
SHA-256: cdf2bd8656d2199a969900934152c593dc453adbe2052571258012006122d708

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