Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71d6344c768d5c9…

MALICIOUS

PDF

90.8 KB Created: 2020-11-19 15:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 90739e710924d4763440cb5eed17c6d3 SHA-1: 94866de0f7fb32eade13b2580e878f1ca93c6d2d SHA-256: e71d6344c768d5c9274faaef024e8f1d07fb5b94df557d2feae5b6912d5f01fd
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to a music album, suggesting a social engineering 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://trafffi.ru/aws?utm_term=biggie+ready+to+die+album PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f962a3a208a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_5f970cc51935e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f8d28477b108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_5fb41dff37542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fad9c7161d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f915b7389e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5f96960eb4cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_5fb38447cecac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f88c8cbb9bfc.pdfIn PDF document text
    • http://bytlly.com/1852qyIn 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/d20b7163-e9f2-4ff1-ac33-686ec180fef4/good_to_great.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc791224-5bb3-4f8a-96d3-5870edc1e899/crossy_road_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bbf7dc-dc87-4800-8a2a-eddfc7320184/danatugade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623618d4-dc90-468a-987c-7dddc56394c1/words_starting_with_gift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f61578d-7d43-4166-8ab7-4e5939a5e67e/39416903271.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_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 5260 bytes
SHA-256: 14cf83cad16c69e1be91a0bb18500c7cb8d378de724d88db796612d4af05429f
font_01_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 13264 bytes
SHA-256: 0b7b135cd34164befc9e50b094f116f480794571a32add019fe91ea765185412