Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2902e2f6a233966…

MALICIOUS

PDF

84.3 KB Created: 2021-08-19 00:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8c4b61a318210e0c7dc4e0aa861245d0 SHA-1: cf050d0188bc13b44668a36d420f1058af7056f6 SHA-256: d2902e2f6a233966c4170a7b27020a34ebf35a6528ac588ee8329527a17e908b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains associated with link farms and compromised CMS uploads, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://americandeliorder.com/uploads/files/42836224404.pdf In PDF document text
    • https://t2sc.me/userfiles/bonezuzutelo.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d7aa1bed7---perora.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/zageriki.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/gilap.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91171bb721---soxivufizos.pdfIn PDF document text
    • https://izr.fr/files/28163172006.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/tuwogiwadunawobelij.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/fewasiwuk.pdfIn PDF document text
    • https://immobilgold.com/file/64804998483.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607952e9db148---85212968107.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/pozejikimagi.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/6170819930.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ohqqj2kc4i8js467da1j61vbad/27152020533.pdfIn PDF document text
    • https://phuquiland.com/upload/files/72487124941.pdfIn PDF document text
    • http://sun-eko.eu/files/file/foxunefunude.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/70c92cd2a7579d4be77cf4e2a011abcf/wirodi.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a85938b98ea---logonavasute.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/xipox.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160861dcee8628---99572884340.pdfIn PDF document text
    • http://trevorhannant.com/77177483065.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/51039956315.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/resofadibuzol.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/529e2057224eb774b401ac99f77cd5a8/43042328250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=factores+de+conversion+ejercicios+resueltos+3+esoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 18216 bytes
SHA-256: 9343da6ed5a402599c6cd9550f4e2724906a7aeee1022782141a5d826c7ce21d
font_02_sfnt_off0001118b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118B 10808 bytes
SHA-256: 7bdcc38e585c2b51cf7de58b9acd155cdc33d21d2bc8a4086c12e0b4152959e8
font_03_sfnt_off00012a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A96 16692 bytes
SHA-256: 6038f833c550d57bc62e9448c3fb1b9b265a63ed12c04fa2a1fd23e4acdae3fc

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