Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7a72cd2ac3486f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-26 03:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65fc190ce0f982109d5faa66db094423 SHA-1: 079f536ba020cb9bbbb1d07b488d6bc07e30937d SHA-256: 9e7a72cd2ac3486f10f6f30af8ebc3d9ba8e766be414e8159d3af97454c0a29d
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though truncated and obfuscated, contains metadata related to 'happy new year 2020 funny status' and the wkhtmltopdf application, which is often used to generate PDFs for SEO spam or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=happy+new+year+2020+funny+status
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/5291975.pdf
    • https://static.s123-cdn-static.com/uploads/4463298/normal_6003232fc2237.pdf
    • https://cdn.sqhk.co/mojikeke/aVrgf4l/22194713592.pdf
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5fdd2edc9a648.pdf
    • https://cdn.sqhk.co/pibepufas/KbiibeY/2750737220.pdf
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/f594e11ea3.pdf
    • https://cdn.sqhk.co/muvotugi/hoifiiC/redream_premium_download_apk.pdf
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/20c334d78fff0d4.pdf
    • https://cdn.sqhk.co/vesagivara/sfgeriU/download_stickman_zombie_shooter_mod_apk_android_1.pdf
    • https://zejikato.weebly.com/uploads/1/3/3/9/133997407/ripizinenofirodilado.pdf
    • https://cdn.sqhk.co/vutabopi/cibNsyy/14858544397.pdf
    • https://cdn.sqhk.co/nubalevuvem/jijib8I/idle_island_mod_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4413373/normal_5ff2631d36d28.pdf
    • https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/masikexurapegifege.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tufuripisaren.epizy.com/mandated_reporting_patient-_centered_care.pdf
    • http://loratozojakin.epizy.com/zanopadaguboninosub.pdf
    • http://xubobesirubujo.rf.gd/61514281682.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_off0000dad7.bin
73b46dda633720fafc6350238ba3e724f238ba7c686e59a12c511528aeec9459		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 5016 bytes
font_01_sfnt_off0000ebf9.bin
1732880f25607e2aa60bfb16077abb5f07d54e57a738d3dbc62af501624c05bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10092 bytes
font_02_sfnt_off00010e85.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 4324 bytes

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