Malicious PDF — malware analysis report

Static analysis result for SHA-256 968e58d4e8e4647d…

MALICIOUS

PDF

71.6 KB Created: 2020-12-09 10:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 05113c95882b512c7f628f8e1262e3f7 SHA-1: 67d5f872cd57a72bf8ff8c7d1ffdcfd40afaffed SHA-256: 968e58d4e8e4647d0c2dc98c1f6e26cf0fee0d17e5f09d366b84749e8e08201d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, with a high risk score. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a 'conjugator' lure, a common tactic for phishing campaigns.

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://trafffi.ru/123?utm_term=le+conjugueur+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fd050e77ece4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fc14c0abb5fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_5fb2d736030e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5f950d0c42739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f99394da63bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9ce2952682c.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/5fc11c6aec917750a3d920aa/t/5fca444c52b5874c859cd59b/1607091278112/nwn2_ranger_weapon_master.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cde0085bf90c0e162532/t/5fc8dfec2dd5737571bf1af4/1607000060865/57556301471.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/47429059326.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/3_day_refresh_program_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/conversion_worksheets_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/71237432840.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/english_grammar_checker_ginger.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB78 2948 bytes
SHA-256: 6193ae5e1ba9309bf1242d6e0a406601078bce13db99ffdf9b0cff6bbb146ce8
font_01_sfnt_off0000c5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FD 4920 bytes
SHA-256: c033ab5c71a85ed6cfa804a037196caa4c6bee781ffb3de8471b5676ef617dbc
font_02_sfnt_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 11048 bytes
SHA-256: 309e721f3a76f464ac8f6d14a6e4fc65634594d3c673576f0a9b05426fd14a54
font_03_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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