Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfb5bf51329c65a…

MALICIOUS

PDF

100.6 KB Created: 2021-06-29 14:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f78849b30b5af69a1a5daa36cdb05b17 SHA-1: 2715e6735227318c68d4d9c22617e84014883042 SHA-256: fcfb5bf51329c65a8613a132addac4fd384c0c3f5debfb8ae41729f4708da2c9
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://xboxheerlen.nl/userfiles/file/54828254127.pdf In PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lk22e31gopvov92epa70bmajq9/rubupemale.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc796edc06a---nudanojakogifumakitalumop.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/3b59d4f9af78a9498f55d47a3bbef6d4/20737094406.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/c7iipo94cb4vj09quamnosh8h1/3469715920.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/dupulafowamomokulisodamim.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/426f1c4366cbc0aee5d5c4e0969720f0/tinikomosixefeletu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/beb4b37c2f82afffc67bdcdf7f2c8142/kaxijokaxoxiwujodexobo.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/wasuvew.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/20c29c0d5cc0ed3fa0f2e9e82d843e55/76904630663.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/72617897490.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/talexukitulagodetusu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa6bdb8f6---lavekorewazo.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/rolew.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e6b2d17d334a936a7356c68b7381e9b2/45459582318.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098be17aafb6---91264915264.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/gumevaxatitadusewivefupe.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/jcekfua41jk6vg2bbhp5mfgf66/22987688431.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd4567744---30891102641.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8a873100fa04de7b0af56d38fdab7197/46293767479.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/eeb0dc29849561b61712af5ee5664166/tasawoxopuriroxikalopu.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/numulirefavopis.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/61669040217.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba247160388---sajibugalademopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=agape+love+in+the+biblePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD3 18136 bytes
SHA-256: 613814b56e2d95791b8b6e8eb9eed8e6ec1f172d97e4d6b52e1a77d830c59997
font_02_sfnt_off00016c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2B 10448 bytes
SHA-256: 10ee3e8a869e599369f27ec6cd42902a91e018854b06b43800946b5c3e90ecd8

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