Malicious PDF — malware analysis report

Static analysis result for SHA-256 980981a83592f35d…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 18:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dff254abb7a63d11a45a474e2890e3fe SHA-1: f6773734f45ea32812881af74d8a1a77e81635c5 SHA-256: 980981a83592f35d39b43c4daa7f909352c79d0a36c0ac837c5398a84cc77f80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, 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 0.9952

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://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3ddf85150e92643c06bc3893cab15de0/37868751089.pdf
    • https://koratspring.com/upload/file/20086285677.pdf
    • http://monkey-do.net/userfiles/file/66195032019.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a502a7a9fb3---89476286588.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160776e3878e1e---detitelemi.pdf
    • http://cablexconsulting.com/Upload/file/vasivuxenitux.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/90db5f0012f7d9b5b565afb028200b86/kalabevifu.pdf
    • http://sjar-tech.com/uploadfile/file///2021062614024717.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca80bd29f3---18840486535.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/46b269a06bdcac16eb316850dd40fcf9/ruwekidive.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd90aa3b04---suvafegi.pdf
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/68834888551.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc0716ac85---86584955634.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/83217617010.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/rg67ged40k0kl1mpdm88ikkit5/99716947998.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ad84dbca927c9a185933330d1dc4de36/tabalunokibimezuzodabibej.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb5a84b9f---54435108965.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/78f0ff1d9a03190b840f3a85c2f01c32/botasadod.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c678c51ef---nitorikisusevudowurikum.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077a2fcd5dda---lutaxedidumigonudimelu.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/01c37a7557c5d5bb1c56fbe2dab4f003/nidazikag.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/72ee67d4474687d6bcaf49a5ceb9813b/15210809431.pdf
    • https://matrainagycsalados.hu/userfiles/file/66322613983.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=restriction+of+trade+clause
    • 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_off0000ed4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 16792 bytes
font_01_sfnt_off00010564.bin
947f68f7de571616f633c5b946fedecf6ff05d3d5a511d247e74d3ce74c7d82b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 10616 bytes
font_02_sfnt_off00011dc7.bin
3166062a9dfbbc42397d823558225caec348cd0b62aa3a89c1a637cb0ad48368
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 17156 bytes