Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdc266705dc1ed0…

MALICIOUS

PDF

69.7 KB Created: 2021-03-07 16:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbf3a88ea571283ded37106156f2541d SHA-1: d1d0b0c73aa592ab1b35ab750421c2f9d07aa7b5 SHA-256: efdc266705dc1ed004ec16caa8cd1d6d2df97e285244ad0b992dba19ad3cd91e
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 URI pointing to 'zajinet.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains keywords related to concert tickets, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or downloader attack.

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://zajinet.ru/wix?keyword=nba+youngboy+concert+tickets+2020+birmingham+alabama
    • http://conicppjry.bid/pefojuzirajemyzp9n.pdf
    • http://myshoes.moscow/nufokerewib50ti.pdf
    • http://mimivamefigupe.sportsontheweb.net/the_art_of_power_jon_meacham.pdf
    • http://xozowilozoga.mywebcommunity.org/what_are_the_main_traditions_of_christianity.pdf
    • http://obzorov.site/87238272578zrs1n.pdf
    • http://gatowixipeba.mywebcommunity.org/nujuvimelasolapojebi.pdf
    • http://richteam.site/648614540919bgom.pdf
    • http://xebubux.sportsontheweb.net/what_will_happen_to_your_eyes_if_you_cry_too_much.pdf
    • http://fabulouss.space/xavevixoriwonuvejv5tp.pdf
    • http://evilcheats.fun/zusizunofuridoxemalevivadwauuk.pdf
    • http://cethq.xyz/how_to_fix_the_timing_on_a_bernina_sewing_machinemejq4.pdf
    • http://100p-f.ru/mulanabixulelimafu2fhhk.pdf
    • http://feyakast.online/ethical_hacking_meaning47aak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_26ccba677bf6489d95ef6eb4c0e145ad.pdf?index=true
    • https://s3.amazonaws.com/rovikibixu/vatican_museums_audioguide.pdf
    • https://s3.amazonaws.com/zaxuledo/3095102252.pdf
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_c22ae6d552c444d4b98346a8a5005ce1.pdf?index=true
    • https://s3.amazonaws.com/kikunojulejuj/the_emancipation_proclamation_worksheet_answers.pdf
    • https://s3.amazonaws.com/bojafazes/11817684808.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_dc2ae0c9d24749aa9d4bb40ed3e7fc0b.pdf?index=true
    • 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_off0000d32b.bin
da38126b1734b384371873f0d63a805d3868a331555b23f76b6dbabf2433b43f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD32B 5760 bytes
font_01_sfnt_off0000e6b4.bin
82efef60cd918f9e8a8411664572140115b6151bb51ef2f3d084eb44cf238a44
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B4 10152 bytes