Malicious PDF — malware analysis report

Static analysis result for SHA-256 7129ce56cb28f010…

MALICIOUS

PDF

92.5 KB Created: 2020-11-18 13:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b3bccef1ea986cf49e27e282311cb894 SHA-1: 15b37b1dfbd5baef58a4175576148956d5ce8a98 SHA-256: 7129ce56cb28f01030567c72f6cfc621ac0160045b89827c24b26b6878ad290b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=pan+africanism+goals+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f8b792ca1a27.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/7307792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_5f9e8f4417f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8fc7b61fd66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f8ca9bcdddd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5f959518eaeef.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/0cd4a9cd-6f30-4aa5-9562-94f1f941ed7f/24847468936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470def7a-d609-40d1-931c-0d37d28a3dfe/problemas_resueltos_de_la_ley_de_coulomb.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/43642315169.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/gafuritedigiposor.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/19296441285.pdfIn 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_off00012e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1B 5476 bytes
SHA-256: 9f309ed8a492caafe9fc8d4c091bcb249451ccf03652cd7a61caa41f424a83c0
font_01_sfnt_off000140aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AA 10708 bytes
SHA-256: 07c59bdd2695c5a7547d0f47cac8993ca0d6d2c297ad34957b06c60b14697fe4