Malicious PDF — malware analysis report

Static analysis result for SHA-256 4347e0043a79b8f5…

MALICIOUS

PDF

64.7 KB Created: 2020-12-14 14:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f66efc5a1abd32c174ab47b569666ac SHA-1: 16c903dea1208917b74584c625d747a4a21040e5 SHA-256: 4347e0043a79b8f56fc7bfcf1599df36f119225f21233b3ffc9d59fcdc603912
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'trafftec.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=chemistry+limiting+reactant+worksheet
    • https://murufafutebe.weebly.com/uploads/1/3/4/4/134473477/4090956.pdf
    • https://nuzuloluxeguvox.weebly.com/uploads/1/3/4/8/134874948/kuladigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/75112736-3cb1-4cc2-b45e-0a61c7675f58/weditibiluzexonede.pdf
    • https://uploads.strikinglycdn.com/files/43905890-7036-42f6-a653-9771f48e9186/dixowanuwofavizeduwewibo.pdf
    • https://s3.amazonaws.com/megujobemegor/zuganop.pdf
    • https://uploads.strikinglycdn.com/files/5b0aca42-e70b-4343-9804-87138fa5aff6/52932886586.pdf
    • https://s3.amazonaws.com/tetenifeme/reduce_size_mac_app.pdf
    • https://s3.amazonaws.com/zonebon/sample_commission_agreement_template.pdf
    • https://uploads.strikinglycdn.com/files/f9f25f48-3fa9-42c2-b0ef-bccce5a7e784/xubofurojuzutavilezivo.pdf
    • https://s3.amazonaws.com/nosepevozux/self_hypnosis_guide.pdf
    • https://s3.amazonaws.com/jepavilutabilel/words_with_short_sound_e.pdf
    • https://s3.amazonaws.com/jepinebawo/43814964155.pdf
    • https://uploads.strikinglycdn.com/files/0db44536-074b-48be-8adf-48b266ae76a1/20701579733.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c00c.bin
7c04148a29ea9e2a6ccf208327574953a8fd750a1f6ba333be5acc770510272d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC00C 5376 bytes
font_01_sfnt_off0000d239.bin
88e5f043a08a8d02e71f995c595bca1ed108d427a692240be6677ce1e2bf7d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 10532 bytes

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