Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5363dd68908ad4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 13:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f30e7b2de6f85c644877932913dd26f SHA-1: 18452ff8560b08fccd187b2b4028800631a7bd59 SHA-256: fc5363dd68908ad4bb17fd4c945966cb822b63d175cae2bbde08dc38ed97511d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to technical topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=what+are+layer+3+protocols
    • https://static.s123-cdn-static.com/uploads/4480149/normal_5ff260564968d.pdf
    • https://rogosibaf.weebly.com/uploads/1/3/4/5/134590501/mizexiki.pdf
    • https://cdn-cms.f-static.net/uploads/4392864/normal_603b0662cf01f.pdf
    • https://cdn-cms.f-static.net/uploads/4420599/normal_603aef37a4a43.pdf
    • http://guketaz.iblogger.org/62636300872.pdf
    • https://static.s123-cdn-static.com/uploads/4500669/normal_5fe052322996b.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fe267c8bdc04.pdf
    • https://gexamamolaro.weebly.com/uploads/1/3/4/6/134640589/selaluge-livawekalazi-divigusaw.pdf
    • https://lifinupal.weebly.com/uploads/1/3/5/3/135336288/wupevoxabuwigeg.pdf
    • https://static.s123-cdn-static.com/uploads/4451950/normal_5fe35e2a71f88.pdf
    • http://joxuwevu.iblogger.org/duremufefosazo.pdf
    • https://cdn-cms.f-static.net/uploads/4382003/normal_6010ef54980d2.pdf
    • https://cdn-cms.f-static.net/uploads/4387924/normal_60175e4ec2bad.pdf
    • https://wetexojozow.weebly.com/uploads/1/3/0/7/130740218/dulejisitizuto-tenadelizikug-pegofog-sawoteser.pdf
    • https://zipenuwoku.weebly.com/uploads/1/3/1/0/131071258/1836497.pdf
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5fdb610dcdd38.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wujawejibizub.epizy.com/mejowo.pdf
    • http://biwovake.rf.gd/virodunomotiwegivu.pdf
    • https://s3.amazonaws.com/ximupuv/turitosodokun.pdf
    • http://rokipomufudivef.rf.gd/49448385774.pdf
    • https://s3.amazonaws.com/gapuruxumeg/rainsford_and_zaroff_character_traits.pdf
    • https://s3.amazonaws.com/jesidofefe/did_hamlet_kill_rosencrantz_and_guildenstern.pdf
    • https://s3.amazonaws.com/fizup/54257960946.pdf
    • https://s3.amazonaws.com/dewutexorob/kirby_g4_belt_replacement.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_off0000ee10.bin
e92c0c16a85a600dc3748b9977302dc45839dafc4356e44ea83fb6d0ffcba0fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 5300 bytes
font_01_sfnt_off00010023.bin
06d6c4f63832b5ab743eb3637ae7286d0636caf44f94798b7551e82322311e64
pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 10604 bytes