Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4772452da4b9ccc…

MALICIOUS

PDF

102.0 KB Created: 2021-01-06 21:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e3a32e3f71d49c681101819996a94928 SHA-1: 27e108f8f874a239a432f82f315dae63d8c5f725 SHA-256: c4772452da4b9ccc65908e9bb1de42b7cd44bac95493845efc12a1d508dcf761
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'traffset.ru', a known malicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to its creation, which does not detract from the malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=rob+lowe+family+show PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fe600cd366aa.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/Ngfiigd/ps4_remote_play_apk_download_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369648/normal_5fcca7062a0e7.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/2TSaVij/free_baby_stuff_brooklyn.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/jgiaqz3/diwasapemewuxupazolevem.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/iiZ6gfm/cyber_hunter_apk_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/eucijeN/president_debate_2020_who_won.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_5fab2c76f1523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_5f995866846bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5fde86e7cd7c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_5faefc6a803ca.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/d3c67c93-0256-4a65-b51b-962043663c3a/35079972681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d794cb7b-ae90-46cb-a87e-b3c07e9297be/gujowojebedesimedawa.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_off00014fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA9 5252 bytes
SHA-256: 3528e43109e997c6cd7b5d5f8380bc6c0d3c250f811c652936b843c855975271
font_01_sfnt_off00016183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16183 12556 bytes
SHA-256: 9525c64f425588beef2b37aeaa6f96e8c80f9f3c93f9dfcc571e945080104741