Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4cf0e0c12e47e6…

MALICIOUS

PDF

72.8 KB Created: 2021-02-23 20:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca9c535272ed5fcbc54a30387f16c1b SHA-1: 78fd501c38650959e71516e650dcf7e8bb5a6237 SHA-256: cb4cf0e0c12e47e6039e9b3472f56a9972a061bec38c62c7f93d46299aa82fee
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords related to tractor parts, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=wheel+horse+tractor+parts
    • https://cdn.sqhk.co/tenalewi/BpjcgcV/drive_download_quota.pdf
    • https://cdn.sqhk.co/gubusase/jhuicje/bubble_cannon_hile_apk.pdf
    • http://jerijoba.iblogger.org/heat_proof_sheet_for_roof_in_pakistan.pdf
    • https://cdn.sqhk.co/bumotinidopi/Kthe8SZ/blazing_sniper_offline_shooting_game.pdf
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ff8bf9f084b2.pdf
    • http://jejufanafozotet.22web.org/39408380180.pdf
    • https://cdn.sqhk.co/noxomosanena/hiThchi/plant_vs_zombie_mod_minecraft_1._12_2.pdf
    • http://sentytld.online/fuvojabopudowupulidifdh7u.pdf
    • http://stroymarketmetal.ru/judevaled5u9v.pdf
    • http://tizezs.xyz/wukumrrdpe.pdf
    • https://cdn-cms.f-static.net/uploads/4465924/normal_601888776ee07.pdf
    • https://static.s123-cdn-static.com/uploads/4369917/normal_5fff511df3d9f.pdf
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fc914d1d2f13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vazorilumi.epizy.com/korean_ginseng_chicken_soup_michelin_guide.pdf
    • https://s3.amazonaws.com/gezetega/the_north_face_jacket_size_guide.pdf
    • https://s3.amazonaws.com/gupojakami/54708084647.pdf
    • https://s3.amazonaws.com/fixararololu/16243214818.pdf
    • http://notaruk.rf.gd/53138169262.pdf
    • http://fisazivibutaz.epizy.com/angry_birds_hack_android_1.pdf
    • http://taluzeze.rf.gd/bootstrap_admin_template_bootsnipp.pdf
    • http://baverasoge.epizy.com/84907691011.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_off0000ddb5.bin
180f23373a57b2fa02af41dc2fd2f923b89acfc8b3ec4b8db0ab08c831958468
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 5032 bytes
font_01_sfnt_off0000eed8.bin
edc91272bfa9875dbeec3667a883bce776ac3820357a195ef17205fb8959c323
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 11672 bytes