Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36cabd11588c5cb…

MALICIOUS

PDF

101.9 KB Created: 2021-03-14 01:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2f3260d20b9adda1fbb19ac8fa10de SHA-1: e4848d155616f9876f63730ed9a3a1696e8d4e45 SHA-256: f36cabd11588c5cb57b79f361d7b02f0b53730413db8f4cf0a79c85ea442ea32
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious URL, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI strongly suggest it's designed to trick users into downloading further malicious content, likely through a social engineering pretext.

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/award?keyword=ba+1st+year+marathi+book+pdf+download
    • https://kamekupamekom.weebly.com/uploads/1/3/0/8/130813698/verepidedi_gerakisonokekuk_sufesota_vafajusor.pdf
    • http://masajsalonunuz.com/p_n_achievers_b1_workbooknktu5.pdf
    • https://cdn-cms.f-static.net/uploads/4375071/normal_601586067c90f.pdf
    • http://llloooodddd.space/tuxinujelenedozadoxqpzt7.pdf
    • http://erethiztzj.space/killing_jesus_2015_castpdaqz.pdf
    • https://sulumakopata.weebly.com/uploads/1/3/0/7/130775191/xupubenigofiseginonu.pdf
    • https://kawijidaxo.weebly.com/uploads/1/3/4/8/134891868/e9eb95b2873039.pdf
    • https://cdn-cms.f-static.net/uploads/4497688/normal_5fd3038294599.pdf
    • https://cdn-cms.f-static.net/uploads/4408584/normal_6010d3cc9b3b9.pdf
    • http://setofexperience.site/pentair_intellichlor_salt_chlorine_generator_not_workinge9sy1.pdf
    • http://juilopkiretlo.ru/gta_5_afk_money_glitchyb9nv.pdf
    • https://static.s123-cdn-static.com/uploads/4383295/normal_5ff6090d8ad5b.pdf
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/govorerow_xunibabigujup_mepika_jugopodenasu.pdf
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/008400fc8a0b4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kujapomib/batman_beyond_comics_read_online.pdf
    • http://muzizax.rf.gd/fabamiso.pdf
    • http://wokudalewab.rf.gd/duxomesasuputekekolawu.pdf
    • https://s3.amazonaws.com/remeranexe/autodesk_maya_2018_manual.pdf
    • https://s3.amazonaws.com/dukajevo/feasibility_study_template_for_mobile_application.pdf
    • https://s3.amazonaws.com/wuxupewu/32852469108.pdf
    • https://s3.amazonaws.com/legipalofi/century_battery_charger_user_manuals.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_off00014d83.bin
9e01b9886ece4bf3832546046391bfd06062c7381135ede57d65bf3ccef7b28b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D83 5780 bytes
font_01_sfnt_off00016122.bin
5c1ac15a03224a1cd24d93899e381c54f53981f89c6a1f11108c9d9069566773
pdf-font-stream PDF embedded font (sfnt) at offset 0x16122 12184 bytes