Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda7ed11046b69c5…

MALICIOUS

PDF

97.9 KB Created: 2021-09-07 03:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2fc006468b1925802db08f67614069b2 SHA-1: 46e52cbc76d0c4e6231dd138e6aecbf83e6179f2 SHA-256: cda7ed11046b69c56a316a15b52598efa984d27d078bf5a5a13b8b0038afcf3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, leveraging a technique consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ketchas.ru/uplcv?utm_term=strike+pack+fps+dominator+xbox+one+manual PDF link annotation
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083f0290146e---tovek.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a074ed645c4---19714730170.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/21f26619fa654f34207f1c2576d2ba86/53305118292.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/90667451647.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/toroseku.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210727224440.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/73a362eff87262d8b834abfde10889c8/batukijewezibasol.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/62536775799.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b23e726f356---68471716168.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/33892099709.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/pesazakejategoxavuka.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/22108122586.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/3747845774.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/e3441ccc5ed345dd012e7bf852d8d1ce/zilubezixukaf.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a372391a9e4---jubokuxiwoniwazaxiwoze.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/bf7d1a985591d7c7a57992dde8481a45/74744376826.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/nidi3jneljtj2baph4r8ifl5p5/faroxifowuso.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xesol.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/wipogozo.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/81107739893.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/dojujepufa.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/17156405081.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/31184178173.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792bc258e9b---zimumanuvasokadotirag.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_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 11288 bytes
SHA-256: ce038393c6a28989b60ed08088edeec0487288226a3c481f04ec13917f3a1163
font_01_sfnt_off000131df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DF 18436 bytes
SHA-256: f3f0fd281fcff1bc70b7e6cce41cad5da7d3947e6e81bfa8efacd16e6b2595af
font_02_sfnt_off00016183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1