Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca2b773fd43ee53…

MALICIOUS

PDF

61.9 KB Created: 2021-01-17 16:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b3acfdc4bd71da7ff6e38dcc68cc8f8 SHA-1: ed53778fb9ff48a5a136a8e61af8f42deeb6ca30 SHA-256: fca2b773fd43ee53c44fe79d0cd29174e9c6564bd73f636275a73dcbae646fb1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to 'traffine.ru', which is highly suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=portable+sand+blaster+harbor+freight PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5ffc010330bff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416140/normal_5fb6c2be6d9b7.pdfIn PDF document text
    • https://site-1175927.mozfiles.com/files/1175927/60693362490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5fa1714a8824a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fd235d9e4150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8a9fb571fb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375509/normal_5ff11796c4802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f88efefdf7d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_5f95f4487081b.pdfIn PDF document text
    • https://site-1201024.mozfiles.com/files/1201024/88307179161.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/ggC8gde/sositivubaxoxosuxutevigov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vezoxonu.epizy.com/savabovepelagabemafupaze.pdfIn PDF document text
    • http://bavizajo.epizy.com/antenna_array_beamforming.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_off0000b417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB417 5308 bytes
SHA-256: 036f972466fddf48d6768967cb55b6375448523eb71b4369b85b4d57ae8250d6
font_01_sfnt_off0000c619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC619 11212 bytes
SHA-256: 44bb231cc1a9f0bd6b116f51fa72dfce4b7959315b468b42348e6a42f54bbc22

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