Malicious PDF — malware analysis report

Static analysis result for SHA-256 9751f4951ceb73d2…

MALICIOUS

PDF

65.9 KB Created: 2020-11-22 08:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 107d2d686327fb3ec286da545f23deb5 SHA-1: 7b27eecc11f8966800b7e043a7edb6f6af911dfa SHA-256: 9751f4951ceb73d24e27baa60e94afad891c39b53717677b4605336d829c715e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The primary URL observed is https://trafffe.ru/123?utm_term=come+reza+ama+pdf+espa%25C3%25B1ol, which likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffe.ru/123?utm_term=come+reza+ama+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8b40b1c1a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f92d7d6e3245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f88863ae8729.pdfIn PDF document text
    • https://pupoximoz.weebly.com/uploads/1/3/4/5/134584835/a2bd65ecdab4109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f989b0e44f82.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/satojubekup.pdfIn PDF document text
    • https://sawanizoso.weebly.com/uploads/1/3/4/6/134654845/futor-gumejogadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fa956f6640ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f9049a1e19ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5f9e7896672bc.pdfIn PDF document text
    • https://bakavola.weebly.com/uploads/1/3/4/7/134753875/73d0750137b29.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/danejezofakawe-ruputesibazi-lidagovofexez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5f976cd26c70f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8d87056f0f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 5352 bytes
SHA-256: 6120fee31640821d39efc095be8b2e5c403e451b58a2e1c4979859a98148e20c
font_01_sfnt_off0000d36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36E 11616 bytes
SHA-256: 30edb4f2aef269ad5cc022d0f70dadf7d2cf938bdf00937f2310682ee9b4330f

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