Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b212c9dbf33a6df…

MALICIOUS

PDF

80.5 KB Created: 2021-03-31 23:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048d24a3dcf72c621a8eb5e36aa3decc SHA-1: 5813310f8ea76c8a233706b352d88d359d19125d SHA-256: 1b212c9dbf33a6df40ed67b482e59954b586e9c26d76e30e81df226dc5fb18ba
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 a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'workout pdf'. No scripts were extracted from this sample, but the PDF structure itself facilitated the inclusion of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=built+by+science+workout+pdf
    • https://fejoburu.weebly.com/uploads/1/3/0/8/130813906/kejazexulu.pdf
    • https://cdn.sqhk.co/sujubowip/csih3O0/prison_life_rpg_mod_apk.pdf
    • https://cdn.sqhk.co/suvotoruwot/XgdgcF9/maplestory2_knight_awakening_guide.pdf
    • http://interior.estate/secret_service_brain_teasersbf5nj.pdf
    • http://gatorama.fun/vicks_humidifier_instructions_v7500thta.pdf
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/870770.pdf
    • https://cdn.sqhk.co/judixixelof/xhjeieN/zikobemejazewapaguper.pdf
    • http://dress-russia.ru/kuxatuxolulimoseseferax7jmtt.pdf
    • http://zzzmmmmejjj.space/call_of_duty_indir_2jyw04.pdf
    • https://cdn.sqhk.co/pedidagow/8VjihaE/bein_sports_tv_guide_usa.pdf
    • https://cdn.sqhk.co/rovonoset/geNieMf/match_3_jewels_gameplay.pdf
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/tudozimunuwidalo.pdf
    • http://limevekobo.iblogger.org/aqa_gcse_physics_hodder_textbook_answers.pdf
    • http://chelamela.org/laboratory_skills_1_recognizing_laboratory_safety_answersgo7pb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://supidanerij.epizy.com/absent_letter_format_for_fever.pdf
    • http://dedamedasobime.epizy.com/6929645968.pdf
    • http://muxolisakij.epizy.com/timiwik.pdf
    • http://kajifota.epizy.com/51379533923.pdf
    • https://s3.amazonaws.com/bitizopovopaso/32515381968.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/bidutiguliwugekezolezozov.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/2013_dodge_charger_front_bumper_cover.pdf
    • http://bebakujudofofel.epizy.com/muzulilugafe.pdf
    • http://nipizil.epizy.com/comments_and_jurisprudence_on_obligations_and_contracts_jurado.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_off0000fc39.bin
598f160fbec4c4864e2294b7e402b08a0287c076a8a50930f4d32820baa2eb7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5384 bytes
font_01_sfnt_off00010eb7.bin
f7383b40d6c6a6fac9127a6d5878dce66a535a0d58f6eaf3bde56469578fac5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 10676 bytes