Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bed9714ec4212c6…

MALICIOUS

PDF

82.0 KB Created: 2021-06-29 02:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8066c898491dbde4ca7c24d6aab21e59 SHA-1: 7c40a7c8ddfd103e5e948942afd9b434d5459907 SHA-256: 0bed9714ec4212c67f5ed6d7b36357b5930d4ebbc35004df3048f523f83a44b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF sample was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://altbuket.ru/files/13604868384.pdf In PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607da59874420---vusozuverukokupisosibu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a9c0f230b---wabazexuk.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021624232537701.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/30835107695.pdfIn PDF document text
    • https://petala.gr/userfiles/file/pukikunakiladotoki.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/625c54c08216465f30fe3f46ec213d62/dozororonepitupowuxeg.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/19538484537.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vtqn1984j9lsuem9e1anumv6n1/37016825673.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/2999987faea9c31e359d5c8fc4303c3d/20545388287.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/vapitilixupevirex.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc139455c4---pesevekudesafek.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3a12805d43cef1cc10d89dad00719048/42290050316.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607debdd9e991---vibawo.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/7bf83016b240fb15deb45fa4e54444ee/gurozejogilonuxamif.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/81919805154.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa423003d47---34133878764.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8f4de4e7677992dad93a176fd5a89e33/3249876089.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b84004196a9---45814873498.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/xozenu.pdfIn PDF document text
    • https://giasutainha24h.com/upload/files/telulaxumederewije.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/10470282583.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0c435392e---nezilevemigimevage.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce3ff05cb---sojemogida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=never+found+you+kane+brownPDF 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_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 18304 bytes
SHA-256: 0f28871f0f359fa777934353c8186f2b9a3b5610fb94bab9f83d6fa8768a1027
font_01_sfnt_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 10520 bytes
SHA-256: 834095d814cd8fee47d8f9ad05d5294789fee9f81d42f85ab7c27cfcabadd0a0
font_02_sfnt_off000122e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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