Malicious PDF — malware analysis report

Static analysis result for SHA-256 10045a44c30e564f…

MALICIOUS

PDF

72.6 KB Created: 2021-02-26 11:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de11389a17044b222b3dbfdd5454ae6 SHA-1: b4e321174e34e2499db65b67947452fdda61ed49 SHA-256: 10045a44c30e564ffffd716601bf44bf89d3bd567d7b451dde845d73b278ac7b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'pelibifir.ru', which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests it is presented as a PDF download, aligning with a spearphishing attachment tactic.

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://pelibifir.ru/wix?keyword=the+great+mother+pdf
    • http://rilomenininun.getenjoyment.net/texudiloxakevapirite.pdf
    • http://werirugileveto.22web.org/19936967318.pdf
    • https://cdn-cms.f-static.net/uploads/4427274/normal_602b0976723e0.pdf
    • http://fikepoj.22web.org/university_of_alberta_online_application_form.pdf
    • http://jekenufakewe.mypressonline.com/68627528420.pdf
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5ff6133756925.pdf
    • https://cdn.sqhk.co/gukisafuw/jjCARtE/pezejowet.pdf
    • http://xonanudo.iblogger.org/free_diary_template_word.pdf
    • http://delinapod.mypressonline.com/79262924219.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tikavufuku.rf.gd/how_to_reset_a_roomba_770.pdf
    • http://sekevidijonuji.rf.gd/train_reservation_form_free.pdf
    • http://gowegonuma.epizy.com/ccde_written_study_guide.pdf
    • http://xidozex.epizy.com/orbit_sprinkler_system_will_not_turn_on.pdf
    • http://rubijisezet.epizy.com/34828325351.pdf
    • http://solatilexi.epizy.com/lewopukazimuvaluwopelapip.pdf
    • http://fejozimi.epizy.com/buxata.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_off0000e22c.bin
62091e583795177f2b8c1b1761c874f33bb110b7d3af5f509fd121ab97a89522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 5196 bytes
font_01_sfnt_off0000f3b0.bin
32d62e79628567fabb4e0d2b3880efecc4a3625bca762cc72031bea33c4d7b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 9972 bytes

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