Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa5cb5da43e26af…

MALICIOUS

PDF

83.3 KB Created: 2021-08-12 03:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 24befcd30062c77722b7dd8c57d9c384 SHA-1: 5cc8cb639dd4d6e6cf59e850d2a683bd0693e371 SHA-256: afa5cb5da43e26af4e28f7761c2498f5d5f7a00f7eddfeb0752e1be3dacef4b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=mortadelo+y+filemon+pelicula+completa+gratis PDF link annotation
    • http://apexnepaltravel.com/userfiles/file/zejegivomefimoxewet.pdfIn PDF document text
    • https://nexusmediation.nl/files/53976633890.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/vivevanip.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6b9cabda---powitu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/092cf289a02c4acacc5edfc5082d34a6/tuwiseduzunebukazedes.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf306822b---66842584956.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/jexobeje.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/de2b6f8267a5cafa7c9bbc6be0d671e7/sewufasemoparigiguk.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/mulewolanolosizokor.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/26970972709.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/xazazavemipidepilo.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf979105f22---mapenolopo.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160af97936865f---4972238234.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/51d198a6c3abb58ce2eebface234d00b/xagexude.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/dasoguxifixebusaxewub.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/cik2qgfqsuplus6dsge5875ng5/4841862061.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160940f7891252---98668278859.pdfIn PDF document text
    • http://cwesp.biz/upload/file/95250563864.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/veloxoku.pdfIn PDF document text
    • https://seerupit.dk/assens/file/jijamowuvepejag.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/3d66f1cfd4e24a809a75fdfe03c8add9/79438712165.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5d82df131---80980492271.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/79886275806.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080bfaf950e3---78477402588.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d6c9a13c---vaguxubitirumoxib.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_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 16512 bytes
SHA-256: 8f981ec83fc279c1c46b3472f8bfda88899c80798acaf506923b54309a19b6fe
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 11172 bytes
SHA-256: 8143e3ecf968180a89dea9da8d7d5dd0fa80c46b0975ecb95f3e3486cd9b6a2c
font_02_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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