Malicious PDF — malware analysis report

Static analysis result for SHA-256 102543431c866e41…

MALICIOUS

PDF

68.0 KB Created: 2020-12-19 06:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1645da29316e9fc59ce49f3d5971d4e3 SHA-1: ee5ee7a5fd0a638ce1d3c08dbc7548130582f922 SHA-256: 102543431c866e410b4dbfea52d1325e85a4bede6050d4139b0d5d7e32030ae3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to electrical circuits, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://traffnew.ru/strik?utm_term=circuitos+en+serie+y+paralelo+caracteristicas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fbcd5d885f18.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/8664920b-d8f5-4542-b242-eb55391b173a/dimumuvudaluxojefidirese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71028e17-3ee3-486a-a3a4-f9b278de85ea/toe_to_toe_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d8d416f6d44b07d7d45f/t/5fca8e609bad9c6911ae48d2/1607110241350/marketing_communication_planning_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9117a4bc-8afd-4aa7-96ad-c9a51d1c9743/tumumalikesewisema.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/the_boondocks_full_episodes_season_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc166e5ab79f442f22d24ec/t/5fc886ac92e74531f3ce4201/1606977196904/dodisafolisiwer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3961a8b5-7531-471c-a0cc-84b25a314f36/79953020107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ee8eb0-bfa1-4cd7-91e8-5e8a1ad9f8d3/71965402705.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_off0000cc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1B 4936 bytes
SHA-256: 16de6b5802006d78e31bb212536de0ccd4e20a5a144ffb55c75172e8812ee74f
font_01_sfnt_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 11324 bytes
SHA-256: f8a0ca99c8b61cfba09908736213313873fbc37852830e3aa3f60edf9e7ceb4f