Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d497ba543779f5d…

MALICIOUS

PDF

69.2 KB Created: 2020-11-17 09:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1fb8786c4a0d09571808331993cacefc SHA-1: 9b546af740ff7001fc43ffc16efe57dfd4c23e45 SHA-256: 6d497ba543779f5deea368e0c717d418f981f0e7bfde09d28783a813039c545c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffking.ru/123?utm_term=franchi+affinity+3.5+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412905/normal_5fabf187a0535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fa6ac1af0978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f991c39195f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f9c8dd42db7e.pdfIn PDF document text
    • https://dakovogusuzulex.weebly.com/uploads/1/3/4/5/134595229/gatekanufogeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f927dd3b8919.pdfIn PDF document text
    • https://bikopevi.weebly.com/uploads/1/3/4/3/134391393/9221495.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/7ca0b61b-e158-4282-8c4f-7f2af15f4ef1/sowopelizemusunokilijoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1767341a-d085-466c-996a-d87c6f6e944f/iep_direct_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a4c48a-2ff4-4c0c-8658-e651895c8865/dumowim.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/4247871692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1405559-9d68-4a4c-a4b5-267887f50669/mario_kart_64_rom_descargar_gratis_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/aquaponics_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac021d9d-2850-4c16-9f14-6424e0a6e223/vamawubomexajorelapaw.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_off0000d269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 5288 bytes
SHA-256: e11552a1368b213f1b08fcaa6768511c23d40fcacc7352a2ac4763aadfe31983
font_01_sfnt_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 10384 bytes
SHA-256: e383cf8ada7600d8279063c736034b059c371bf2d352921f3ba6b119cb7f1929

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