Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edc3ccf3021b60a…

MALICIOUS

PDF

84.0 KB Created: 2021-07-02 07:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4ada11293a67d7d3f5c4d2c6182d53f SHA-1: c588e1e383935dc4814264421984e09268773188 SHA-256: 6edc3ccf3021b60a6f3ba2f801b21da132817aea7d3f0803f89780d4b4af897d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

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://catamma.ru/uplcv?utm_term=orbot+for+pc+windows+10+download
    • http://domeinbeverdonk.be/assets/files/file/52656187440.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e1336b4f---29977593807.pdf
    • https://opsclown.it/ckfinder/userfiles/files/10688670561.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4fc1be7fd---69247600964.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070c3302aa24---46016999676.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/a5f22227678da049b9c17d1f541e0531/25565604338.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/36a6c47c0231a839c5170a15eb535a88/zeriwejaganoxigisifiwex.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b811ee069da---wudeseguxeguwezejipisagus.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085e4e901909---63179541959.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/418543792471c6e98e062394c5a8564b/11749962417.pdf
    • http://abimobiliare.pl/pliki/File/63623086156.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072961d9e7a3---10410331645.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/053cb8b9bae33244babd5b03e78ff4da/90949807939.pdf
    • https://rosycaffe.com/file/napelukewufusoje.pdf
    • http://chromowane.com/userfiles/file/tugujasefotarep.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7d66c9f08---nitutepazadetomogigat.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/1ba2c514f844565d59baac00960cb618/6078840342.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4b7d8097757d4f1f736b0e7bb5bf8f4f/26571000684.pdf
    • https://afra24.com/basefile/afra24/files/48767105588.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087292681bda---23696861459.pdf
    • http://rolmech-strzelno.pl/Upload/file/78786501746.pdf
    • https://oversaslogistica.it/file/52207777581.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/xuwakemexi.pdf
    • https://pmms-online.com/assets/file/82926166444.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e794.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 16792 bytes
font_01_sfnt_off0000ffa6.bin
8b1671d9cd5cab6a3e138c09b59c4470b105405dfb0ef44c72c25b863003ac3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 16208 bytes
font_02_sfnt_off00012985.bin
c04c11635a0d59bc52e0596604727a2055f48298b17062515dcde0ffb3450cac
pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 10904 bytes