Malicious PDF — malware analysis report

Static analysis result for SHA-256 4103c559cffa24b2…

MALICIOUS

PDF

78.6 KB Created: 2021-03-01 18:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 641086cfef947f61880cc18a564e37e1 SHA-1: c160e80446dd198979758bf8844c5d11ef75a37e SHA-256: 4103c559cffa24b2786872c048ccd2cd646b6bdebdac3e9d82d59ceb4e171213
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious, with a high risk score. It contains an embedded URI pointing to 'fokemale.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an 'installation video' or 'award'. No scripts were extracted, but the presence of external URLs and the nature of the heuristics indicate a likely attempt to redirect the user to a malicious site.

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://fokemale.ru/award?keyword=alpha+omega+elite+65+installation+video PDF link annotation
    • http://scm03.ru/bose_companion_2_series_ii_price_in_qatarybs01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5ff4c5c0851bc.pdfIn PDF document text
    • http://heliusdesign.ru/renutivubatevofoesorb.pdfIn PDF document text
    • http://copyright-services-us.com/joxelenazetumoxajitaruwxpkc.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/LgIggge/dokivapesatomazesuwito.pdfIn PDF document text
    • http://bluebadgeapproval.com/163371547571gpu1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_6031063c98f1d.pdfIn PDF document text
    • http://zootime.store/munivurafokenabevias.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_6009944d15ccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taguramol.rf.gd/90055449436.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/tulja_bhavani_mata_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/roll_up_banner_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/819867124.pdfIn PDF document text
    • http://ginokaze.epizy.com/saudi_arabia_flag_image.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/hawkes_learning_discovering_statistics_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 5604 bytes
SHA-256: 7d39c25edc999fbb65879d87f97618815b00e86edae4de953554022330e5498f
font_01_sfnt_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 10184 bytes
SHA-256: a29f5b7b4b30b9667f670aa58bb624fce2de50122692aa5bd2561136f79839b0

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