Malicious PDF — malware analysis report

Static analysis result for SHA-256 292a6bb0796ef782…

MALICIOUS

PDF

84.9 KB Created: 2021-06-27 01:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 647e11e3e44b9298af57606a2735b11d SHA-1: 3aa05f2e970ad861737463242d62aeafb6b88137 SHA-256: 292a6bb0796ef782b333ee22784e150a8a31981d0547f76d8580b1371360e864
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://anmimar.com/royal/userfiles/file/46692204670.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adc052ad138---93858988716.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/l620pdt86h11i4oqp3tdsrs05i/64825349247.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a271de40419---kewisulezobusuzokaruri.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16096134aa39bd---zujem.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a2af48c21---46596682280.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/wonojegusubotunuvupafepiz.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16071f6b36f0cc---kutaxufeposipuvusibog.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900f753be00---77591640390.pdf
    • https://ludifrance.fr/userfiles/file/lulugefidivu.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095b286c9cd9---vijagusiz.pdf
    • http://aircond.md/upload_fck/file/69133024766.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/23f08b912410b64fcd862add3816bf27/46510603187.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/desafuwizimobibowi.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079e9fa0b3a0---xeguzule.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/16473563833.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ntvhb2qrmb5kkbrq8k0s2fnqi5/bejatabuvugoxokiv.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/681a07bf11514b7424bbd35a24995cdc/21139300229.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/4dbe3db923f2891759f9989168b9b5dc/36472125649.pdf
    • http://stellarp.com/userfiles/files/49735096387.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/76107726239.pdf
    • https://virtualpulse.eu/UserFiles/file/zuvuv.pdf
    • https://danielstrehlau.com/userfiles/file/47344653695.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=disclaimer+for+confidential+information
    • 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_off0000e873.bin
bc10121bed79c604fda1164184cceb180d92f7caac8df7e58f99e3e649b96629
pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 16876 bytes
font_01_sfnt_off0001140c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1140C 16792 bytes
font_02_sfnt_off00012c23.bin
59b4bce9ad414ef1c94329912d92ba8298403ac142e5e65c0a5b2edac1dd3aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C23 10640 bytes