Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2412d29a818bfc…

MALICIOUS

PDF

75.1 KB Created: 2020-11-21 07:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 66a9ff193e50a38d70401ffae3c54343 SHA-1: 1e8569c1681f4455fe905ae61f1ef4d10078dc05 SHA-256: 2c2412d29a818bfcb28eac176be90e0e2f9a9f577bce669d25c6eacde4c4b533
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The embedded URLs, such as 'https://trafffe.ru/aws?utm_term=consumer+reports+air+purifier+comparison', are likely used to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

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/aws?utm_term=consumer+reports+air+purifier+comparison PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f991bcf17a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5fa92422f0ee1.pdfIn PDF document text
    • https://neburaguvud.weebly.com/uploads/1/3/4/4/134477844/5224704e.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/gologebadok-xudum-delovil-mirugutas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f9fb3e7032dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_5faa753b74299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f889fccafef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_5f923ee1c3353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fa79295929a3.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/b5dd5fee-5a77-4a6f-96f9-115ea6351d08/polearm_mastery_reach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9ae484-9fd8-41eb-b6b4-c3e87fdb1988/wuwikigotiwefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd08c4e1-ba48-4b24-b13e-79cdcdacc23b/43721563916.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_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 5036 bytes
SHA-256: ae3d0422e399ef87e066987789b28bd0a03bce3bd7d00336cb572c8b9a64587f
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 10852 bytes
SHA-256: b5dc6b9a251294c443189326c6cac0a068fb9511807127dcacc7eb09d9a76737

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