Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4288262be9841e…

MALICIOUS

PDF

80.1 KB Created: 2021-02-19 08:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05a8eae0a9446659e1f81bcc5cc6cd4 SHA-1: bcd970c6940f56f7c9c6b805a049f541ad5bbb2e SHA-256: cd4288262be9841e7c2e1bb564ee8a409b7f3a64f1cb43b6d9560c95ad025b61
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 a suspicious domain, which is likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common social engineering tactics.

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://bologen.ru/wix?keyword=molarity+and+molality+calculations+worksheet
    • https://cdn.sqhk.co/mepapogivoma/3ijraTC/73599268947.pdf
    • http://shopbest.online/gizivumevokoretasadjfydv.pdf
    • http://matroskin.space/fiwojukanamunipedu45dw.pdf
    • https://cdn.sqhk.co/seworani/g7hhkH0/teacher_assistant_certification_online.pdf
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/1568947.pdf
    • https://cdn.sqhk.co/modurasisuwu/Pp4higi/mini_racing_adventures_vertigo_crash_cart_contents.pdf
    • http://naturagrush.space/half_blood_prince_book_plotr0j1v.pdf
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/93b9f06.pdf
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/8569054.pdf
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/3208200.pdf
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/03719800a95.pdf
    • https://cdn.sqhk.co/venifirub/dzhjAib/household_chores_in_spanish_worksheets.pdf
    • http://mail-autoscout24.net/54382303548uu8nx.pdf
    • http://lojasamericanasbr.com/descargar_turbo_dismount_para_pc24uew.pdf
    • http://milansit.space/99145732659nwz7z.pdf
    • http://fuwenosod.iblogger.org/jobolanogexabobu.pdf
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/477da9a255d858.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ronufabadexulab.epizy.com/lagu_cakra_khan_baru.pdf
    • http://vazalavowudepip.epizy.com/jifenosomakojuxuvob.pdf
    • http://wuwedutukuw.epizy.com/kaspersky_antivirus_licence_key_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e184.bin
eb7bb7105c0a0efc44bc17da756acc8e29e633d1be1d089e057e05af3a870359
pdf-font-stream PDF embedded font (sfnt) at offset 0xE184 5324 bytes
font_01_sfnt_off0000f382.bin
7903340685fbc55ef6ab39d73cce6ca9cacbc74923fb346645d0e39c5f65db5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 14796 bytes
font_02_sfnt_off00012236.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x12236 4324 bytes