Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddc417b363ebd9b…

MALICIOUS

PDF

65.0 KB Created: 2020-12-18 04:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1ec3a35d7dfd6d04f23c4c3817d67d SHA-1: 15a8ea13f0d1bd032a3638cb67e93ab4bb96151c SHA-256: dddc417b363ebd9b075c4150abb5be7dd01ddacd0230c2b267be63fe023dae68
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 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=artorias+dark+souls
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5fd7dc9620297.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fad3bae7a237.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce208b705f6b5d2cc46ebd/t/5fd68c01d654060362ce7056/1607896067687/allianz_oshc_claim_form.pdf
    • https://s3.amazonaws.com/zumomasugipeno/20583702960.pdf
    • https://static1.squarespace.com/static/5fc64750084698658e82ef44/t/5fd6585413a48350e810ed10/1607882836987/happy_farmer_schumann_sheet_music.pdf
    • https://static1.squarespace.com/static/5fc7014702915d4a16f5f256/t/5fd225d1fec2791e310fd49f/1607607769276/57666385927.pdf
    • https://static1.squarespace.com/static/5fc5deed104edf1d77a34246/t/5fca47f19c93c058c4910142/1607092209955/lawn_mowing_service_mcdonough_ga.pdf
    • https://uploads.strikinglycdn.com/files/a0157b4f-00c4-43d0-acfd-685692d819e0/67118208525.pdf
    • https://static1.squarespace.com/static/5fc0f4a62e34347c70445090/t/5fc1abaf9b1ed035381a9df3/1606527922281/25789141811.pdf
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc234e908845d0924d3c4e0/1606563050707/nuxolowikugumozabopuzu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fd.bin
f24146690d4b51ca954c430c9a9b04f125b237b02f104c6ae0bdeebc7545678b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FD 4872 bytes
font_01_sfnt_off0000d698.bin
8be9ba98944ae3cae5c4cb178dc4bd031957ae94e03ec5c0cdff80e33e4acadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 9708 bytes

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