Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89d80e1167233dc…

MALICIOUS

PDF

83.5 KB Created: 2021-05-08 12:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ba2abe8dd3efb96465c653f8b5c640 SHA-1: d7350a646eb91c9d7797d91199253d7cf53af0e5 SHA-256: c89d80e1167233dcdc637806e8aeac6b1c940a983cc2e386bbbe9f770ddbfb77
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain known for hosting malicious content. The document body, though heavily obfuscated, appears to be a lure related to a book review, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=tony+robbins+unshakeable+book+review
    • http://keviboxe.iblogger.org/acoustic_analysis_of_speech_kent.pdf
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/ee1353c3e.pdf
    • http://rezolawanelu.sportsontheweb.net/sewupoxabonugij.pdf
    • http://rivepozepuxar.mywebcommunity.org/bipolar_transistor_characteristics.pdf
    • http://gupirod.iblogger.org/93072075984.pdf
    • http://nogurufegu.mygamesonline.org/what_does_the_term_separation_of_powers_means.pdf
    • http://vegofejolafud.mygamesonline.org/65516249922.pdf
    • http://kuwawaf.mypressonline.com/the_ultimate_vegan_cookbook.pdf
    • http://sepukolobu.sportsontheweb.net/nomekafep.pdf
    • http://rabiwitijif.medianewsonline.com/vetofozixo.pdf
    • http://dimopun.mywebcommunity.org/advanced_cfop_method.pdf
    • https://vasefifux.weebly.com/uploads/1/3/1/3/131382239/1f0fa7beb0.pdf
    • http://matemepujibad.scienceontheweb.net/difference_between_reliability_and_validity.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rupesujutiwu.myartsonline.com/77109861998.pdf
    • http://banezisiwirasu.rf.gd/kakevitizurukipenevan.pdf
    • http://bamonoxo.onlinewebshop.net/nawikexini.pdf
    • http://tiwosutodegadax.onlinewebshop.net/47602359084.pdf
    • http://vabopegimunufet.rf.gd/79811052935.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_off000105f8.bin
e0456e5488053eda7351cfc87702e51467693c2c1e134ea98d5c2d2458d32a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 5180 bytes
font_01_sfnt_off000117a7.bin
9b11465b8eb53addc89df5dec7e4f304616b4889f10a4b483e7fc89202c37fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 11568 bytes

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