Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d004b18a0f0d13…

MALICIOUS

PDF

71.9 KB Created: 2021-09-30 10:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8be9b51d91422234ea26dd00515c53f SHA-1: f02b23b8aa894097f84978f95342c840bf9c9e5a SHA-256: 95d004b18a0f0d13b1814d96d3871fcb7449be9306bdec778f068904e4c7ba4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely involving a phishing or malware download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=hex+number+to+decimal PDF link annotation
    • https://kabelkyaobuv.sk/editor_uploads/files/98738830076.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/totukibovo.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/8682146022.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/zexamadinejolujibet.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/jebut.pdfIn PDF document text
    • http://micruts.org/userfiles/file/dumuz.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/538a56c147219fac3100718611383da4/daviwiv.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/sobevedoruza.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/31744631903.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/bijubudolujenepi.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/35042738486.pdfIn PDF document text
    • http://bochkari24.ru/pic/file/46169489447.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///88624314595.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/46877961708.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/58810434576.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/pefubajo.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/97527588655.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/molejoxatifexafe.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/62856841634.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/47255629297.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/tonujovepegedugap.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161347e126537a---kopukenesikavo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39E 10696 bytes
SHA-256: 4f702f7eda2a6294081ad778fe9996554f65d3b2a9ad76eaf22f4fe79161af55
font_01_sfnt_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 17992 bytes
SHA-256: 42421ebbf96613ffd47716769f5f98243306633f1d04f8f6f821ac533b7dc2a1
font_02_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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