Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8ee10e533f7858…

MALICIOUS

PDF

67.6 KB Created: 2021-01-03 11:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7dd9e1261808b9f3de0a2da23a9938 SHA-1: c317f0981df8429251b9aabe44ebe0a88ac56086 SHA-256: 5d8ee10e533f785844acaeb5091fa47f637f9a234848b4b961bfc7822fc19093
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The embedded URLs point to various domains, some of which are unknown or potentially malicious, and are likely used to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7807

Heuristics 4

  • 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
  • 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://trafffi.ru/aws?utm_term=metformin+hydrochloride%252F+vildagliptin+galvus+met
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5fe5a7127bffc.pdf
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f9bcbe44d33e.pdf
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fb2e9f0c52de.pdf
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/jolotira.pdf
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f8a99a88da5b.pdf
    • https://static.s123-cdn-static.com/uploads/4375088/normal_5fcd53bd61f9d.pdf
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fd6358eb8073.pdf
    • https://cdn-cms.f-static.net/uploads/4465919/normal_5fd22d62cb88a.pdf
    • https://cdn.sqhk.co/vuxesojogugu/VzUKXG2/nameless_cat_level_15_cat_food.pdf
    • https://cdn.sqhk.co/retepisej/jbiiwV8/rugby_league_2021_season.pdf
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/pufibegipenibop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/radubozufiwo/52034044105.pdf
    • https://s3.amazonaws.com/novipaliwid/information_memorandum_report_meaning.pdf
    • https://s3.amazonaws.com/tosevud/pool_cue_weight_guide.pdf
    • https://s3.amazonaws.com/levumoduf/15557438586.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cabd.bin
759a70179d12a15553f04de7a9d815aa0ee29ebb5a54317dd0edeb5573915678		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABD 5772 bytes
font_01_sfnt_off0000de5f.bin
ed153a387723e95163ef4ff6184cc4f8dcf6150e687be768dd4a9e54303d6946		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 7904 bytes

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