Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b1bb15abcaac8a…

MALICIOUS

PDF

57.5 KB Created: 2020-12-21 08:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8482f74be6d7f0372a73f8b0dcf8a07e SHA-1: 9042236025d909f584900aff69957f307ea94b60 SHA-256: 72b1bb15abcaac8afc4db6b7e167b1c01c7b3f6846ec56463e78e050af0e3e75
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to external websites, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=traxxas+link+app+old+version
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/1588486.pdf
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/mupixanafiv.pdf
    • https://likivaduzizi.weebly.com/uploads/1/3/4/6/134699319/sovamul_giremesazake_fewosikiduwa.pdf
    • https://pesakezered.weebly.com/uploads/1/3/4/7/134729162/9679380.pdf
    • https://static.s123-cdn-static.com/uploads/4500450/normal_5fc8b3a561ce8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/53d8fc46-6cc5-4258-8467-2b89ba5c9d6a/banco_de_valvulas_caterpillar_416c.pdf
    • https://uploads.strikinglycdn.com/files/02ddb71b-a7dd-46bf-b633-47bdfb6f2b38/all_in_learning_careers.pdf
    • https://uploads.strikinglycdn.com/files/6b1cba1c-0e96-4b03-b286-2c71adf6e608/car_game_hacked.pdf
    • https://uploads.strikinglycdn.com/files/9dee019d-0c21-4422-8bec-adb329aa8473/91438265694.pdf
    • https://uploads.strikinglycdn.com/files/c289fc68-90bb-4e61-be77-b3f22d2c26f5/massachusetts_rmv_drivers_manual.pdf
    • https://uploads.strikinglycdn.com/files/675609c7-61ec-43ed-96d8-d58f253541ac/22636527647.pdf
    • https://uploads.strikinglycdn.com/files/e2223c26-5155-432b-9bfc-d0894059170a/guardian_fsd_booster_blueprint.pdf
    • https://static1.squarespace.com/static/5fc799c9a4492a057e246fe7/t/5fcba0f7a0b42e3566abff42/1607180535844/fitness_programs_bodybuilding.pdf
    • https://static1.squarespace.com/static/5fc70934a3ccef3526e90d89/t/5fce8797eed1f524a17ca90e/1607370647946/diced_turkey_and_rice_casserole.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46c.bin
23bc0e2134b2566b0c4f70a3f7992a88e5008006c53705019b9d8803d4cba499		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 5092 bytes

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