Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd0f6ffd3aacba2…

MALICIOUS

PDF

85.7 KB Created: 2020-12-28 20:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 06615f834632759620f1d12a5e625498 SHA-1: ec037cd3ba7d8a57a61871eab12f2c014d72e9fe SHA-256: ecd0f6ffd3aacba204fa8156a769eaca87f4ba4904b70fb59973a613b7d8fd10
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/strik?utm_term=didi+conn+grease+2', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is sufficient to infer a malicious intent.

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://trafficel.ru/strik?utm_term=didi+conn+grease+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5fcbaa79d1a6d.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/bhbjggc/10251015740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_5fba8d1c2553b.pdfIn PDF document text
    • https://cdn.sqhk.co/palubavuz/Kqiohjh/chat_rooms_free_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5fe729ecc189f.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/ighaBEu/excel_vba_vlookup_multiple_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5fb26382cc8f9.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/d1PghaN/rewards_program_apple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5fc8d48d98c3c.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/mesotodimus/pibaxoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02ed8f9-25bf-40e2-ba96-df0813f4ee15/derefik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c8c38b-b386-499f-934a-d03ff52eed99/camel_racing_dubai_schedule_2020.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_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 5204 bytes
SHA-256: 0f7854d065a92a50e2794a9a1fd961d1b49a05b03045586756c50b0c4c4783de
font_01_sfnt_off0001243e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243E 11212 bytes
SHA-256: eb9b082f5846693ea358eb33245bf687839ec48ff50af4b5fb8f7d1bc049d28b