Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd2aae36590bee8…

MALICIOUS

PDF

68.1 KB Created: 2020-12-16 20:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d6b561cd95f1fa7293592ee8ffa7a789 SHA-1: 588d27305b30f83a50512bb58ddb49b61e4dba71 SHA-256: acd2aae36590bee8305039ae810c3a598996c1d417b2cb244ed8bea0a455f2dc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely intended to host a malicious payload or redirect to a phishing site. The document body is heavily obfuscated, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attempt.

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://traffset.ru/123?utm_term=waterford+lakes+farmers+market PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412387/normal_5fba88ac0e9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_5fc00b102b621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5f9e4a74c8f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fbfb450d2667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5fa32ad2c3175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fb84153a5e60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/barron_s_sat_2_chemistry_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d7a754-3e66-44e1-88a4-aef136afc463/minecraft_easter_eggs_jeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd46be5-80a2-4dd2-b973-176a8021c416/4740135599.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/rujaxeponu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c7655c-de6d-4104-abc7-71ae48811cfc/45792678831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b8d462-1010-49c8-858b-a395536cc404/pump_it_lyrics_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46326ab8-4528-43a1-9417-75482e08e6a5/gegepevegiritesijumezase.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/mcq_anatomy_abdomen_and_pelvis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be425d0a-0b79-4595-8261-8f0fba4572ab/14918437106.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_off0000cd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD07 5132 bytes
SHA-256: e974f06b54e49a5aa5e05b214e9a75b59de55f0da0054c106c8b547e0b173da5
font_01_sfnt_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 10900 bytes
SHA-256: be40c0ae1b30ba44ed575b447880f5ad7fd8953030a6c82c25138e2a6dfb160a

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