Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2844904a4bd0416…

MALICIOUS

PDF

85.2 KB Created: 2021-03-05 21:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bef038b92a4ea3fe2a4359a8431671f SHA-1: ead6fca94c41dee54fba7e5f4f92acc664d58472 SHA-256: f2844904a4bd0416e90c6c99b7f3b5df2758d2836a2053a8dabd80367cda2be1
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, indicating a high likelihood of malicious intent. It contains embedded URLs that likely lead to phishing or malware download sites, masquerading as educational content. The document body, though heavily obfuscated, suggests a lure related to 'anatomy physiology and disease for the health professions workbook answers'. No scripts were extracted, but the presence of external URIs points to a likely download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=anatomy+physiology+and+disease+for+the+health+professions+workbook+answers
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/c022b.pdf
    • https://static.s123-cdn-static.com/uploads/4411512/normal_60094eb8dcfc4.pdf
    • https://static.s123-cdn-static.com/uploads/4496602/normal_60005843904cb.pdf
    • https://beveroseve.weebly.com/uploads/1/3/5/3/135316004/081c0aea789e.pdf
    • https://cdn.sqhk.co/javeduner/ha8hexj/cheap_haircuts_near_me_open_now.pdf
    • https://cdn.sqhk.co/supesuvepo/gcKjfha/last_cloudia_strategy_wiki.pdf
    • http://kipivejezijab.iblogger.org/brother_in_arms_gameloft_apk.pdf
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/kunalutosib_fesebufudozes_guxezaxiboxumaf_sumobaxav.pdf
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5fd79b0aea367.pdf
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/gebaxutumaji-tibog-lofijena-lukufew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lufafutogixafu.rf.gd/cardiomiopatia_takotsubo.pdf
    • http://bewaxupu.rf.gd/67886173229.pdf
    • http://faruvesisok.rf.gd/gb_whatsapp_messenger_app_for_android.pdf
    • http://bapijutuzum.epizy.com/kidukapizi.pdf
    • http://nazupugifo.rf.gd/what_is_the_best_book_for_mcat_prep.pdf
    • http://vekaxuluxixabev.rf.gd/ice_troll_cannon_guide_osrs.pdf
    • https://s3.amazonaws.com/pukaridimupo/clinical_guidelines_for_diabetes_mellitus.pdf
    • http://tenurusimuxu.epizy.com/how_to_clean_my_conair_clothes_steamer.pdf
    • https://s3.amazonaws.com/mekonulegipero/feteroza.pdf
    • https://s3.amazonaws.com/pilazi/hult_international_business_school_mba_fees.pdf
    • https://s3.amazonaws.com/jemisajoda/epic_seven_labyrinth_farm_guide.pdf
    • http://vemesivudaro.epizy.com/pabusixugekagevokexobetut.pdf
    • https://s3.amazonaws.com/vojapu/depressive_suicidal_black_metal_guidebook.pdf
    • http://wulixojapekapa.epizy.com/7978463543.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_off0001098a.bin
162b1271166aaa7524fc85345595a1b4a4989f8ad6ad0b25d5bf997c601ab2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 5844 bytes
font_01_sfnt_off00011d58.bin
132b5623924fba10e47d10e83f6a10dde2f8f2a27a46d5acd8fc5d5fadd97464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 11596 bytes

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