Malicious PDF — malware analysis report

Static analysis result for SHA-256 34afe2665cafd920…

MALICIOUS

PDF

66.3 KB Created: 2020-11-27 21:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5b142d3e5d9469a8469cd8c1d8cd19ea SHA-1: d15e90d1d86586d198244a196d3e1ed130b4d931 SHA-256: 34afe2665cafd920b01a597ea322a974e6196778baf2d3a602a382525282510d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://trafffe.ru/strik?utm_term=kiss+me+guitar+chords' suggests a lure related to music, disguised as a benign document.

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/strik?utm_term=kiss+me+guitar+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fa4058a03093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_5fa46a81ef1ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5f9f8e73654ce.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/xaropine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5f9477ba97876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fb743028cc28.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/e2389e49-6de5-4ab7-beeb-092b4b5cb7e8/kanda_shasti_kavasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b748486-d3e7-478e-9e85-863366079ea8/servidores_y_estaciones_de_trabajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/medasejil.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/lojez.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/83293197892.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/founding_brothers_by_joseph_ellis.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/jumanji_google_drive_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd74f86a-8d0f-4673-8f78-b0bd227da84b/girls_of_penthouse.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_off0000c560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 5292 bytes
SHA-256: a140eb625706b9b9ff9376d3e4197378d16006c3aa747b9386733f65e949c93c
font_01_sfnt_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 11052 bytes
SHA-256: d6176efa40f99a287579d5b69f11d164de9739780fadec3e73d314187f755ca7

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