Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9297749fe5def9…

MALICIOUS

PDF

99.3 KB Created: 2021-06-27 01:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dbbb33024ecae5a26eb8d3982360ac3 SHA-1: 8b7f5eff39d297db2325e6736bf3375455ffbc0e SHA-256: dd9297749fe5def94bbbf50954770476d22d9a56dd5583006be7c3fc0292dc36
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. These links likely serve to redirect users to malicious content or phishing sites, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/28208ea4b01455a8c7b1a322a71d2449/83379421567.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3348833f4---notinusazugajizakedati.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8233e1860---sesirijazuloforeda.pdf
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/19065974120.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160911cb7e390b---gizabubuledafisovigazuse.pdf
    • http://anaminfo.com/attachfile/file/jegezi.pdf
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/rikalu.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b47585114---44348988401.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609162148f27e---93265210348.pdf
    • http://women-for-marriage.com/ckfinder/userfiles/files/93761914650.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960d95a105a---juxuboxanodatowip.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8a1bb4af---47703705018.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/1i84sg1bm879b5jgfljv0jqjsh/neviligalizusulud.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb9986876---82799885275.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/14b01d941ffd65ee4be0db9d375c4a42/16717479606.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8ekhgi72v4nvc1h7cb01kvp6ct/zujafirabowexudo.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/43a118ec53c08bd1851f3801a5e60610/72347359831.pdf
    • http://cosmickino.ru/sadm_files/duvoxenisimum.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7057efbb93d89f488a3c00538a4a0723/duzugameg.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839e195a5fd---xejexefanajapewis.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cddf3f320c---sagokuxesovel.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/pen5bsiqcufj4h6colr59gi8n4/71920457632.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160906775c0cee---wesolir.pdf
    • https://istocdukkan.com/userfiles/files/kikigepumu.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd349af2cd6---17206377208.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=authorship+of+the+book+of+isaiah
    • 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_off000120e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E0 16792 bytes
font_01_sfnt_off000138f7.bin
683498bc939b3040670e00472f82bd28d91496d40f9f3660d51f15129a0311d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 10620 bytes
font_02_sfnt_off00015141.bin
65d845455644aef4d155982225e7209ae2387dbfdf80fa4db05fda2ff7d94d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15141 17300 bytes

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