Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a9daabc32057f0…

MALICIOUS

PDF

63.0 KB Created: 2020-12-05 07:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c9a69c5fa89e579137968e3a198923 SHA-1: 80aa78a94c960a5ca4a9038e08c307cfca64ef1c SHA-256: b4a9daabc32057f06db8966b3e7c6fa1989fda0ec79aa4ad7dd8d2bb5b0c13ad
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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://traffine.ru/strik?utm_term=taco+bell+cook+job+description+for+resume
    • https://wepubimixojipo.weebly.com/uploads/1/3/4/5/134584552/2583969.pdf
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/8f6660e1.pdf
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8da1f0e13d5.pdf
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/3438710.pdf
    • https://padomixuboji.weebly.com/uploads/1/3/4/5/134527159/vugagux.pdf
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/sapadebimatovuzik.pdf
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/sulesogesunisozin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0d04a3b0-2df7-453d-87ce-95765021633b/oknotok_1997_2017_cassette_full_down.pdf
    • https://uploads.strikinglycdn.com/files/8e9c1028-5ffa-4ef7-820d-b482430fab66/vijonofuvasenij.pdf
    • https://uploads.strikinglycdn.com/files/a37abd57-fea4-458b-bf42-767902c55346/aprendizaje_basado_en_problemas_carl.pdf
    • https://uploads.strikinglycdn.com/files/4f775655-34ff-4ffa-92e5-8870b99f235e/define_scumbling_in_art.pdf
    • https://uploads.strikinglycdn.com/files/7b0664f4-3c5d-4c9f-b862-af4faa4143af/greg_norman_golf_clothes.pdf
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc1fce0eaf37e3b64e2797f/1606548705646/tisonijoziwimirowejev.pdf
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc146d01972c46e3ccd920c/1606502097302/notugusifapufejikasu.pdf
    • https://uploads.strikinglycdn.com/files/b65548dd-b678-4eed-91fc-4552108ead1c/xaropazo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce20.bin
3f0ff1694b954cfb7d5fa686d2d538660f8a894f0dd8cfd976cc36a149c298bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 5532 bytes

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