Malicious PDF — malware analysis report

Static analysis result for SHA-256 74544dbef1878213…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 03:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf2bb40330afb52576b37e746a8e6cc SHA-1: caef4c3ca54f9ca4482ecdba297fef29c38cc492 SHA-256: 74544dbef1878213e32427f9b2a3953a36a19a720e5bd25c5d4ceb8aca2ec62b
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that masquerades as a search result for 'zombie killing games hacked', likely intended to trick users into visiting a malicious site. The PDF structure also shows signs of manipulation with duplicate object bodies, which can be used to hide malicious content.

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://midufefew.ru/wix?keyword=zombie+killing+games+hacked
    • http://groby-ritual.online/vag_comwupo0.pdf
    • http://coolmag.biz/how_do_i_put_my_samsung_dryer_in_diagnostic_modezq7sp.pdf
    • https://cdn.sqhk.co/gudijupimeb/9agitcX/31768224722.pdf
    • https://cdn.sqhk.co/temejikowewa/Riewkjj/korean_words._flash_cards._vocabulary_builder_app.pdf
    • http://zevibeponakat.getenjoyment.net/personality_disorders_dsm_5.pdf
    • http://leririv.sportsontheweb.net/47857068541.pdf
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/af88404391b46e.pdf
    • http://ukrinsure.com/is_red_cross_test_donors_for_covidg5i61.pdf
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/35beb6.pdf
    • http://gordei2d.com/what_are_some_ethical_issues_of_editing_human_dnaap5jx.pdf
    • https://cdn.sqhk.co/disegivoji/rgcjhgd/xoruwezupikepemegored.pdf
    • http://raftgjgr.space/geratugexazjyn8.pdf
    • http://glossywp.online/xijowosimiporako3m0tz.pdf
    • https://cdn.sqhk.co/fugapaloter/aIhfDgj/40445008669.pdf
    • https://laxigotugib.weebly.com/uploads/1/3/0/9/130969680/73455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/116118f9-2a26-4304-866e-8d77c3ac1019/how_do_you_fix_a_garbage_disposal.pdf
    • https://uploads.strikinglycdn.com/files/a0142f2d-e1fe-41d8-aa53-8c6d619a6837/how_to_use_an_american_standard_jacuzzi_tub.pdf
    • https://uploads.strikinglycdn.com/files/f8004518-fd18-47d0-9b0a-c1736f313127/54950865822.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2a.bin
d70b585f71acb651045dd3679b2063bae7e24d7b21f8e830b13992aec4f19875
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 5124 bytes
font_01_sfnt_off0000fe62.bin
f53a546cd895cf2a126db5bcf65e19dadcd5dc4996053c6a23f46fece21e27bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10704 bytes
font_02_sfnt_off000122e7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x122E7 4324 bytes