Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc8142846231af4…

MALICIOUS

PDF

75.5 KB Created: 2021-01-06 11:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c0b3990e4132c6de5c206e281a1b354a SHA-1: cbdcf2d65e1713e0118107f0990459641e698c42 SHA-256: edc8142846231af48c3c8fa2b1cfaba722e19f39dde8583b6d3341f7a7474577
116 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an embedded URI pointing to 'trafftec.ru' and a heuristic indicating a QR code lure suggests an attempt to redirect users to a malicious site. While no scripts were directly extracted, the PDF structure and embedded URI are strong indicators of a phishing or malware distribution attempt.

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/aws?utm_term=wechat+mobile+app PDF link annotation
    • https://cdn.sqhk.co/xadowififux/icgjWZj/merge_wars_best_idle_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fe6187d5a662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5fb7d570c0b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_5fb4b1a3dcf3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5fc1f1eb36fc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5ff0363aa3d0b.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/de5f336b-ee3e-4e00-9bf2-dd57d14bc283/lagasitulopagopuwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27aeb4b2-4a56-4a52-ba1a-9a69267f0e52/tatozujezaselamozo.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/belexewumidoforeb.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/21785407160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d194c80e-1d16-4a81-bc02-bdfc16dcb1fa/virilita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5358b5fb-bf9d-4d91-ad48-a2ea3434dae3/enerpac_porta_power_20_ton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689816e4-365e-4e01-9ec2-84f3ff357d41/simplifying_trigonometric_identities_penguin_worksheet_answer_key_with_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a5c4f7-80a8-49b6-8f50-6dc966008851/orthographic_projection_mcq.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_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 5052 bytes
SHA-256: c8d89a5cd3d7da5f562b60aefcae2c8442a9153d9c0192179628d842e7202d11
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10940 bytes
SHA-256: 829fa8fef63e577902e3ee4dc6a7acf5fc324d8d7e12f16e8fb7246c397c12d2

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