Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9a091247e8eff2…

MALICIOUS

PDF

66.6 KB Created: 2021-01-08 07:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f8df38efe5bb5993eb460a8f14ebc16 SHA-1: 3319b44cb557a31a45fc669a48f5b8e670eecb57 SHA-256: 7a9a091247e8eff2e17e8b2f5431c70e0ce1cd1714e63fb2af7b29546ea4328f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used in link farming or phishing campaigns. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8232

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=small+pdf++desktop PDF link annotation
    • https://gojodisob.weebly.com/uploads/1/3/4/6/134664442/832a59db9c8.pdfIn PDF document text
    • https://lupigufenof.weebly.com/uploads/1/3/4/5/134509144/jakoxoxavef_birejumebopeto.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/ZR5VK3Z/osmo_mindracers_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/supibufuk/hijhgja/76756234895.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/m5ijhim/get_dragon_scroll_skyrim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23a1ac1-e0ed-449a-a314-7192ec1e5351/bakujubematonupudoxapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17dd4fc-b270-4618-8436-bf5ae12a7e3a/virumizureguwodosegijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fe8c03-81e3-4caa-9d5d-7116ea6ee64f/constructivist_theory_of_sla_focus_on_skill_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8ad00f-567f-4e48-93ce-cf0bcd65e8a2/42518809561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cac5b1-babd-4cf7-ae97-6d3d76564174/chakra_frequencies_tantra_of_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9759ce-8564-46fd-94df-ff97445266c1/runenimikipudatadiwanive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a2b055-4fde-4aab-9e49-8cf44e28449c/26633729208.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 5260 bytes
SHA-256: 2d18a4ffb5e9f4ab520cd571a36caf005595779e1955cd2746833fb44dc51541

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