Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3c2ed2f55df145…

MALICIOUS

PDF

57.2 KB Created: 2020-12-17 00:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cb3f6cdd8d5d6f4ca985faf982923d5e SHA-1: 78da15df5b9e557adb129e7f00d1299c51a10388 SHA-256: db3c2ed2f55df145822b978cd4b05b2ee0f77b13a5ee0e9098bfa015f479e5a2
96 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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru/strik', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, suggests a lure related to 'Ap seminar iwa examples'. No scripts were extracted, but the presence of multiple external URLs and the ML/AV detections strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=ap+seminar+iwa+examples PDF link annotation
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/xujiritiropaz_mupow_bibupaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5fc78e0e88304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_5fa64baad1f33.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/1247371.pdfIn PDF document text
    • https://ririzunok.weebly.com/uploads/1/3/4/7/134712782/8358985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f9054ab1b46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444874/normal_5fc3cc003c6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408485/normal_5fda85d25cb75.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/wonoti/lista_de_medicamentos_aines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18bbd0b6b03258f3a1e10/t/5fccde4d83d2ac65cc130190/1607261773660/38696205041.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/14673331822.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d122dd96f5918e4fb09/1606372626575/46130122599.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_off0000a8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D7 5116 bytes
SHA-256: 7fb7759f00705bec5bc195f9a688de15ca75878fb0649d501990655da32415a3
font_01_sfnt_off0000ba34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA34 8876 bytes
SHA-256: 58447f2f28f76171d49ef579d70f73fd9cc96c80fa21e3c3a2864b984c482773

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