Malicious PDF — malware analysis report

Static analysis result for SHA-256 f083b36694e22ea1…

MALICIOUS

PDF

96.0 KB Created: 2021-02-28 20:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f6e949d81251805aef11ca3f5583d25 SHA-1: 47d7f931cc5d7527a147b5772e8769835087f17f SHA-256: f083b36694e22ea1af418dde16e30d00dcbf9daa861d9f4fb26c53d0c9fe8914
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. 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 0.9997

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://vilenefex.ru/wix?keyword=cape+fear+community+college+2020+graduation
    • https://static.s123-cdn-static.com/uploads/4365547/normal_5ff6063664403.pdf
    • https://cdn-cms.f-static.net/uploads/4407994/normal_602024bb7097f.pdf
    • https://cdn.sqhk.co/xurajalijok/gzwoge8/animus_stand_alone_apk_vision.pdf
    • https://cdn.sqhk.co/votojuxosaf/ggplbhc/backyard_baseball_1997_scummvm_download.pdf
    • https://cdn.sqhk.co/dofexoxev/7t0xARi/granny_horror_game_2_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4472486/normal_60356fe957315.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezegoluzose/angsana_new_bold_font.pdf
    • https://s3.amazonaws.com/befafuni/duwebujiguxoxagodek.pdf
    • https://s3.amazonaws.com/sorogamat/tabodalulopezajafux.pdf
    • http://lifimakapusijok.rf.gd/crack_your_brain_questions_and_answers.pdf
    • https://s3.amazonaws.com/voropa/pokemon_fire_red_legendary_guide.pdf
    • https://s3.amazonaws.com/benuka/5477377741.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_off00013aee.bin
ec08b36a183fafb5165bfa6ce1af86ab3eded616b9742de3231b6c65fbb3f34f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEE 5576 bytes
font_01_sfnt_off00014ddb.bin
cbaccb502801fa20b07bc138701ec0ecdf0cec9530d3a1707a4eb59bf88b9289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDB 10812 bytes

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