Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dfecb280e80ea8…

MALICIOUS

PDF

87.4 KB Created: 2021-06-30 18:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9646dc2ce9cda845baae7f6a11a398df SHA-1: 219f21b5d168f74ce31f3bfbdfc949c8e86349e3 SHA-256: b6dfecb280e80ea8c8fbdcd991061a9ad1b4e8cf1c78ebfda1de3332123f2b15
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to compromised WordPress sites and a 'download button' lure suggests a phishing or malware distribution attempt. The document likely aims to trick users into downloading a malicious driver toolkit, as indicated by the URL parameters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://spherule.org/wp-content/plugins/super-forms/uploads/php/files/5hdrcridq6j1767ai6ng19paj6/6072474921.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e491eb86f1e5091bc2ffa9f85a2ad04f/fizolavimaka.pdf
    • https://egyseg.eu/ckfinder/userfiles/files/nutasulojeraruvebeno.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/091524bce1aaf3909139b73eaee294da/xuwazamomi.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/kreric9b4mjg9aj1ev9mandt04/59095546013.pdf
    • https://isosklo.cz./uploads/rukepi.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6410e5b377---pafiwufafokev.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc65c1f786---kuworozovosututabe.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b27a743a---zumenizejeronuno.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096012f02571---dadipolaxejepo.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/nvmk8e55f98lkj2pf91qi2152d/vemiwitixituripusavajob.pdf
    • https://koratspring.com/upload/file/5455880682.pdf
    • https://egyiksem.hu/uploads/file/finugariferoteripukob.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eddef0537---vudefurosomurozoru.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77ccda0a8d---83376200324.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd579cb197e---werolenoxonodewadinew.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f9fb105c0---miwone.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608156e74cfa8---14841951031.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086596c23314---kuxezeb.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a21feaf3b94---paniwuwivus.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c0128cc2a---jojaxepuvunebivalokuvekur.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/66221430183.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/957533c67406ca37f3452679d3b859b9/kujeroz.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/e5c9df5953cb7992452981bb6c0f4816/vokexudirodisevo.pdf
    • https://aduanaldelvalle.com/userfiles/file/47462364900.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=driver+toolkit+with+crack
    • 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_off0000f2fe.bin
cd5d43c50ba10a171d3cda408832c96bff4a923b2db2d67214e037b01c007399
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10300 bytes
font_01_sfnt_off00010a61.bin
752a50e4e111b215b5e3136ea8898c0c004af2d29b7ec45c2960463f08fde1ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 17408 bytes
font_02_sfnt_off00013833.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13833 16792 bytes