Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a55c9141baba6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-02 14:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26afa42a4e2573cce17cb6a0b22558f4 SHA-1: 28d7ed81af37a751c809956450c0a09795c9b53f SHA-256: 846a55c9141baba69bf8ab7c7da7832014cce09e77e6bc09b3b6ae9e1ef1da3b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious domain, likely to download a malicious payload. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=wilderness+and+the+american+mind+pdf
    • https://cdn-cms.f-static.net/uploads/4416490/normal_602be7bddd1f2.pdf
    • https://static.s123-cdn-static.com/uploads/4377909/normal_60048677bfcd2.pdf
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5ffe5aa89054f.pdf
    • http://blog-millionaire.buzz/sijoxokojupiliwaxabah6im.pdf
    • https://cdn.sqhk.co/javabufe/iHX5Nig/58570393933.pdf
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fe7cb0b9a270.pdf
    • https://cdn.sqhk.co/titubebojek/9iajjgc/wish_me_meaning_in_kannada.pdf
    • https://cdn-cms.f-static.net/uploads/4415291/normal_6030dcadc0824.pdf
    • https://cdn.sqhk.co/xutujipux/hjjghfC/parkour_race_free_online_game.pdf
    • https://cdn.sqhk.co/juvekuvop/XDXIias/saguxuwepokuvete.pdf
    • https://cdn-cms.f-static.net/uploads/4470979/normal_6027d80d7ebc4.pdf
    • https://static.s123-cdn-static.com/uploads/4421471/normal_5fc7c6e046bcc.pdf
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5fe14e7a4533d.pdf
    • https://cdn-cms.f-static.net/uploads/4448539/normal_600c678a68b6e.pdf
    • https://cdn.sqhk.co/murevexi/dmieu4t/ufc_fight_night_odds.pdf
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fc8853261658.pdf
    • https://cdn.sqhk.co/nixenexax/1RamDgj/white_tripod_floor_lamp.pdf
    • https://cdn.sqhk.co/pulisamog/WdhiIPR/spacex_crew_dragon_return_to_earth.pdf
    • https://cdn.sqhk.co/nananava/gddtggT/white_and_blue_triple_s_leather_sneakers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f7e3.bin
0024a785b86ab5c105385bcebb3a45ad2eafbbc68f72a4a3cd5a2a7577cc8376
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 5408 bytes
font_01_sfnt_off00010a25.bin
e8fd1228c99e30bef199f559033ff4c98827984b825fe0287aea728e815b30f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 10296 bytes