Malicious PDF — malware analysis report

Static analysis result for SHA-256 33269cba0dfeb3b7…

MALICIOUS

PDF

82.0 KB Created: 2021-02-21 14:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 185de03a22587fa9af55631f2ad8128c SHA-1: a402184feafeda76f36539a8a36875fcec2fb64c SHA-256: 33269cba0dfeb3b722d2f1275d06030a79a038d15c6ea9442ec583b0d440bec6
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, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to educational material.

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://seumenha.ru/wix?keyword=algebra+1+final+exam+review+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414868/normal_602b2c3c0fd19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fedf4981c03e.pdfIn PDF document text
    • http://samoe-samaya.ru/revofuwofagegozedamikejo9l056.pdfIn PDF document text
    • http://mimamiva.iblogger.org/camry_2017_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jesidofefe/31102616880.pdfIn PDF document text
    • http://zopefunexot.epizy.com/thala_ajith_viswasam_movie.pdfIn PDF document text
    • http://jugejojejaf.epizy.com/voboli.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/malasizep.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/see_you_again_movie_version_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/python_for_data_science_cheat_sheet_numpy_basics.pdfIn PDF document text
    • http://jekowatu.epizy.com/25761429937.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/bhairava_movie_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/42074347278.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 5180 bytes
SHA-256: 3cf6f1bceeadffca334c9871ff287dbe72f406094ab64d2949f634707ff6189b
font_01_sfnt_off000106fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 11240 bytes
SHA-256: 2ea6a00cc5f93c48b50ee0fdcdbc6e33623cd1f5ac514462a69f7eeff5a30ae8
font_02_sfnt_off00012d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3