Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c96a5848ed7814…

MALICIOUS

PDF

67.1 KB Created: 2020-12-16 09:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdef597401da3c4837d44c05bbc31798 SHA-1: 52252034d6418cd5e16aaa802b0efe82032207f0 SHA-256: 14c96a5848ed7814cf496566f63bd180fb653a6c72eea2b89a068287db65a24a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, including one to 'traffking.ru', suggesting it functions as a link farm or redirection service. The PDF structure and embedded links are consistent with techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=narwhals+narwhals+swimming+in+the+ocean
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f965cf18f24c.pdf
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/4351431.pdf
    • https://cdn-cms.f-static.net/uploads/4409102/normal_5fa31a743af5b.pdf
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f9726f51ff39.pdf
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5f8f604ec04f2.pdf
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5fd7f07b2fc24.pdf
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f9b1ce9f1b82.pdf
    • https://vafumesaz.weebly.com/uploads/1/3/4/5/134589630/18a4063177e546.pdf
    • https://cdn-cms.f-static.net/uploads/4425214/normal_5fbd230855286.pdf
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f92791012f3f.pdf
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fa84b334d59e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce57e4564f736a5831eea4/t/5fd74dadb1c3f31c7a9ec299/1607945645961/bootstrap_form_inline_input_group_addon.pdf
    • https://static1.squarespace.com/static/5fc718b7f784ea51367e45c4/t/5fce9c0670d9fb65f59b8e09/1607375880047/zogifizegamonuto.pdf
    • https://static1.squarespace.com/static/5fc77919feeefa0c0b621f1f/t/5fca58df56557d544bfb7353/1607096544174/dipijoka.pdf
    • https://s3.amazonaws.com/kisimujuk/pivemu.pdf
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc6fe341d106d256bb79604/1606876727299/we_die_together_quotes.pdf
    • https://s3.amazonaws.com/kulinisokakewi/mokugorifonaxujo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c3.bin
bcb9dd284cd69ff84e4c6007e062bdcfb1eec845331704308ec9342b2b0ae084		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 5272 bytes
font_01_sfnt_off0000dba2.bin
4a3309504140acfcb9b3004afb7334c6906dbb8a5fcf9b91f1b67c117baa2564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 10488 bytes

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