Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e34afb023ef6781…

MALICIOUS

PDF

96.4 KB Created: 2021-07-17 16:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d664f765e52c25546e4bae3a77173c8 SHA-1: 2945ae1146fc4924885ae469b1516a4a9df8b0d0 SHA-256: 6e34afb023ef6781a3697cad5c8d3d2b4388319cf9ed6734c693f5c19a450771
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of numerous external links and the 'Urgency/Deadline Lure' heuristic suggest the document is designed to trick users into clicking through to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160715037434e8---gozorol.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4n6nbn9hrla7mc6e751756rlj5/78948302279.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c54a7baa58---rolin.pdf
    • http://446888.top/userfiles/file/54940716972.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/90ca0447c57ef4bc3974b5f81c04e295/62244871907.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2afc61e9---zurizerawusa.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/m649chakcd6k0ka7b4d33i6gv3/70511197017.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3377f1e42e---venipol.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b55d6afa---velozadenoxadavurinom.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f392db0214---83736643639.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/4e217f5c9b921a64a99885c6b78bd25f/virajazomaboles.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2e830bb0e135532e871b703d525ef9dc/nixomodoxupi.pdf
    • http://blpest.com/UserFiles/file/72164397687.pdf
    • https://alamansyria.com/userfiles/file/75837472170.pdf
    • https://serwisnawigacji.pl/userfiles/file/24068214392.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/064c60bee221b237d90a951f547bbbb7/59703507939.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/e38cfe064882ce389bcc76cec980b2f0/97204832640.pdf
    • http://gibisch.info/files/files/81609524416.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/nemawetemugizedabemugapig.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/66b38ffc8aca264d2ea9c9fcbc97f8e4/sijiderarewuxojuvofiz.pdf
    • https://artasedanasingaraja.com/uploadfck/file/tilapufelinoxatudel.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098c98fed996---71473934038.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n9sp3h11tbr9vhesosslhdaas5/telimudewijisukumujukepe.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160920ec85cd51---84582590485.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=valerian+root+get+you+high
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 16792 bytes
font_01_sfnt_off000118ef.bin
a671d37c7b3b889284622d243fc9727f378cc914a66da79eb58e164c6b93b0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 16076 bytes
font_02_sfnt_off00012e12.bin
971851b662b8298d06055722ab1bd90aeba82befefbb6162f8947259561194b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 10400 bytes
font_03_sfnt_off00014587.bin
74bb75515351ec17c27d61643fbb47f01c0551924bbeac871399a97381cb23b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14587 17108 bytes