Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a854ca797a8d86…

MALICIOUS

PDF

75.0 KB Created: 2021-01-18 22:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 29b99f5ff9c7fb67dbbaad35685745a6 SHA-1: 7e5246a5a033a03cae0a7508f65d8814a2c857a2 SHA-256: c9a854ca797a8d8620fe267dbc14be8212b5474547ab56395a3746ff4ded6e39
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing lures. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?utm_term=men+women+and+chainsaws+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fde582572ca2.pdfIn PDF document text
    • https://site-1200667.mozfiles.com/files/1200667/34315978967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5f9ffe3c66a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407807/normal_5fc53bc7bb4d7.pdfIn PDF document text
    • https://site-1177655.mozfiles.com/files/1177655/jarejufewabarepebilotegiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fbd74bd5ce99.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/callaway_preowned_coupon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc5d7ad5c49c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482020/normal_6001a954d1611.pdfIn PDF document text
    • https://site-1180361.mozfiles.com/files/1180361/comment_fusionner_des_adobe_reader.pdfIn PDF document text
    • https://site-1239330.mozfiles.com/files/1239330/brand_guide_book_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5ffef828d7fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9642e8bebc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fddfe659549b.pdfIn PDF document text
    • https://site-1224368.mozfiles.com/files/1224368/suborilomepituva.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/kokesatodixon/relinidewapus.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/bleaching_colored_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/a_b_c_analysis_full_form.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_off0000e91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91A 5364 bytes
SHA-256: 08d9c6c75ecafc1a7af83fa31248446d48aeba28e4c9e543353a52b88c67f6b2
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 10356 bytes
SHA-256: 1333df89e929a114bbcc10d70f89d3f3035e915fe1a92d3306b034932ff181ea

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