Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f355ff918eb4a3…

MALICIOUS

PDF

71.7 KB Created: 2020-12-15 05:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e908108c057b678def122fe3f04f02c5 SHA-1: 0b7f4e6b8a716f1dacc032cacd97d06401a2d7b3 SHA-256: 72f355ff918eb4a3e8c49d775a8e995c7d891c8986ae3c47538dcf4546991d11
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. 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 credential harvesting or further payload delivery.

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://traffine.ru/123?utm_term=dish+solo+node+wiring+diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403818/normal_5fc5c67f3a6ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_5f9d5790a3450.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/fesil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fb719cdbdbc9.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/zorisivifiz_sufawasaxujuli_tiduramoxeruji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5faaf37e80c28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc55c58405d5340f347683d/t/5fcd031a8a55f2188b7b0d6d/1607271195383/forbidden_lands.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db779955c744b55d5a92/t/5fc67d057acac6192aa2e065/1606843654586/22932132331.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc2c1fda97599144e5294cd/1606599171936/56916444884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d735e933-d51c-404f-947d-9d8ee8afc2f9/f_117a_stealth_fighter_nes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce05bb90e5b06becb3f5d4/t/5fd709a1e5ac58289638f85b/1607928229756/xozizagizeworepovirum.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/cambridge_5_test_4_reading_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f60409-96ec-47f6-8447-d3d670037923/sas_zombie_assault_insane_asylum.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_off0000dbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE9 5328 bytes
SHA-256: 29d621399e0af934df3199702daf6390cb59f57e54fd8c351bd98ddb6f9fa22d
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 10696 bytes
SHA-256: a5e33245c3443baf2acdb3e1cc40186ac923db6b2f9b55665fbef3f44ae17d7b

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