Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d91488dff846f7…

MALICIOUS

PDF

61.1 KB Created: 2020-11-28 08:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33d5e72716ff9fab170a9c8c4f53a54d SHA-1: 66d6dbaa68142fb8a0befb1efd8a0111f955819f SHA-256: 12d91488dff846f73c3000c6eaa14ba049890929e19d70167afb0c4a27853465
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm attacks to manipulate search engine rankings or redirect users to malicious sites. The ClamAV detection and ML classifier flagging indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7613

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://traffset.ru/aws?utm_term=competitor+analysis+template+ppt+free
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/6232464.pdf
    • https://daxuferawul.weebly.com/uploads/1/3/4/5/134592581/ruwugowexawakove.pdf
    • https://lesofexofolusik.weebly.com/uploads/1/3/4/5/134506957/fumigudegibowax_gikipadubajasep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e11fbf9e-7d53-422b-9b2b-30670b84e422/74702619992.pdf
    • https://uploads.strikinglycdn.com/files/c2f072bc-17a6-4bdd-8b2e-a596414807db/25586252170.pdf
    • https://uploads.strikinglycdn.com/files/f2380484-fcee-4685-8b7f-6197ae93461e/padizirijirogiti.pdf
    • https://uploads.strikinglycdn.com/files/5cddda1d-daf6-414a-9c12-7c7fca6a2e96/78605674348.pdf
    • https://uploads.strikinglycdn.com/files/4f4a00f3-3af9-49e6-b3be-1f4d8b03fc6f/minecraft_videos_stampy_hunger_games.pdf
    • https://uploads.strikinglycdn.com/files/8093e819-e9fc-4f67-8ae6-c3c228612d3b/indesit_innex_9kg_washing_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/5957a2f2-8be3-4f7a-af93-7a0b90400b1d/rims_for_sale_in_killeen_tx.pdf
    • https://uploads.strikinglycdn.com/files/ce3e6b3c-7dc8-41ad-b569-572b5c9e7ae1/cumplea_os_feliz.pdf
    • https://uploads.strikinglycdn.com/files/273a186a-fbea-4332-919d-6c366f7b914e/sofeb.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca41.bin
52a542acf6864ca4895c894aad5e7cacbe7e895dbf2a3a65d1d6452087691c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 5052 bytes

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