Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19b0c3777c26623…

MALICIOUS

PDF

78.8 KB Created: 2021-03-13 16:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a6dfd36bc0522b698d320efda132a3 SHA-1: d19a0b84aed446fe1e119591b13d7747014b004e SHA-256: f19b0c3777c26623529898a95230453695176fd994772249267e38db55e8a51e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of external URIs suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=sample+career+aspirations+statement+pdf
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/9707650.pdf
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5ffc55afe5342.pdf
    • https://bokawagorulok.weebly.com/uploads/1/3/4/2/134234603/fupusupigidojubomag.pdf
    • http://finuxezanasa.mygamesonline.org/billennium_story.pdf
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fcc2f4d1f0ce.pdf
    • https://zepekofudi.weebly.com/uploads/1/3/1/4/131407423/sifomizabusukurop.pdf
    • http://tavafotuzefox.sportsontheweb.net/19842447582.pdf
    • https://cdn.sqhk.co/mesodimeduje/yiibhiJ/nadoxemazetagofomevinodab.pdf
    • https://cdn.sqhk.co/nefakovuwot/K70EDja/pic_pac_pineville_ky_hours.pdf
    • https://cdn.sqhk.co/naliwanik/wwOhcg4/82466016512.pdf
    • https://jusopara.weebly.com/uploads/1/3/2/6/132681150/de5c57.pdf
    • https://cdn.sqhk.co/dexediwiboze/Lcemjb2/38996081113.pdf
    • https://cdn-cms.f-static.net/uploads/4495974/normal_6028b9a84f9c7.pdf
    • https://cdn.sqhk.co/pazaxefuma/hc6gjkn/mosetapajilamupovaker.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nosepevozux/antivirus_gratuito_android.pdf
    • https://s3.amazonaws.com/gumagabu/99460040536.pdf
    • https://s3.amazonaws.com/wifiduxezo/fibatogesubazijifen.pdf
    • https://s3.amazonaws.com/dalava/kupobenipovilako.pdf
    • http://tofilijewok.atwebpages.com/sakubibanidoda.pdf
    • https://s3.amazonaws.com/xoguwavosuje/wutesoso.pdf
    • https://s3.amazonaws.com/pulujolatepuv/neopost_is200_series_manual_price_entry.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_off0000ea5e.bin
b53c98a6e37dfad0fc2a60319ca4b48c260177bc9d92dbcb823457af0b51f574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 5192 bytes
font_01_sfnt_off0000fbdb.bin
bd0c678a831df21f5bc5796928fc8260c3aadd24e3acb148e656ede5d55b4732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 10408 bytes
font_02_sfnt_off00011f8b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8B 4324 bytes

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