Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3668f8ffb1edcfa…

MALICIOUS

PDF

85.6 KB Created: 2021-02-18 15:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62b1f0ac50a2bdfafc4384e7797c3487 SHA-1: bc9404af6595e8291b10cd19355034890c5c94c5 SHA-256: d3668f8ffb1edcfabb918abb6d04a5ceddd3974e95a8e69cde86abcca0e4769a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a malicious domain, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a product manual, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/wix?keyword=poulan+pro+blower+bvm200vs+manual
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/runaxe_dazevozipewek.pdf
    • http://jajifejeda.22web.org/android_studio_3._2._2.pdf
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/rekireruw.pdf
    • https://cdn.sqhk.co/xuluriwu/biiJ5gj/gixuge.pdf
    • https://cdn.sqhk.co/zivuputid/fuhcgeM/avenged_sevenfold_this_means_war_song_lyrics.pdf
    • https://cdn.sqhk.co/puzokopu/fBjhhiU/kureboter.pdf
    • http://wavepolabipal.22web.org/portfolio_website_templates.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mupukesunobaga/men_s_fashion_gift_guide.pdf
    • https://s3.amazonaws.com/ritoma/91006329379.pdf
    • https://s3.amazonaws.com/gomaxod/main_idea_ereading_worksheets_robots.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011e14.bin
735e04d285007e137ecc01d7dcbd9eab9979c599df9ffc35f2e22d653968c3c2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11E14 23216 bytes
font_00_sfnt_off0000e6ca.bin
3ba267e4f243545b0306e247c90ab1ec54fdaedd6710aa83f0629f0b398ad6c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 5532 bytes
font_01_sfnt_off0000f992.bin
117ab28391b68c5196694eed48c2eb8a46fa4114b17272c3ba84b19663729e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10572 bytes

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