Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f202c725bb75004…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 19:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7e3625c38e846e8382ee1ac3060ac7a SHA-1: 0e5dae6647012eece69b201451f73b212a54d582 SHA-256: 0f202c725bb7500466c7922625f4626c9564b255a14c3d47a8c97d0666c5bafd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the link structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zevkotodoseme.com/upload/ckfinder/files/ginadigijizob.pdf In PDF document text
    • http://creptiles.dk/userfiles/file/15301474891.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/64435097722.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/50277478114.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/xegedubit.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613026c5a3b84---tonuxitakinag.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/xuriwubinuzodafe.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/71712794087.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/gufufipemirozolevorotufo.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/47405057183.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7d759dce5f40257d96773d5237e2d617/natulovoduto.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/tezoxiparumax.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/71750074266.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/83764543111.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3d93d82b6---54219055503.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/76pso0tkt54mhv7ni2mlnkkjn0/vadez.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/fejojibuninorateb.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/naninarakog.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400d588848e---15205983909.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/69214013671.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/xodixogajetimejidivegine.pdfIn PDF document text
    • https://chsromania.managenet.ro/images/file/gevavufagapomemiwe.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/988963381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=best+way+to+send+video+from+iphone+to+androidPDF link annotation
    • 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_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 11036 bytes
SHA-256: 774c8ec4a496ff2a17daf1fa9cdd715ee202cd46aed818d08a3bb37fcc649c2f
font_01_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 17988 bytes
SHA-256: 59282d4859e551c9caf5c87129f7ee304a4af45ccc7dc1709dffc4042bd9a2f6
font_02_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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