Malicious PDF — malware analysis report

Static analysis result for SHA-256 462ba3c5de708654…

MALICIOUS

PDF

108.5 KB Created: 2021-06-27 09:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 879cca4d0beedc9e87e21d1ccba2901e SHA-1: 4823c0ddd2f1e26c3e5efb7719e7f33758ed2f14 SHA-256: 462ba3c5de7086543ab568348910f30edd5c9eff59cc58611a4a254ca1c5ca74
196 Risk Score

Malware Insights

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

The sample is a PDF identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to defraud users through fake lottery or parcel delivery schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://oniceh.ru/uplcv?utm_term=humanitarian+mission+meaning
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080af69265b0---murav.pdf
    • https://akita-inu.lv/www/files/files/62580035222.pdf
    • http://buildinggodskingdom.com/webcms/file/taremeteb.pdf
    • http://kolaykanal.com/userfiles/files/60100063822.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4840d80ff509c438e50c595d42434370/pelixodanobojosuxir.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bfb8d5a785678b7ce6bf0d0e20467f9e/84136998238.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46fe00e9f1c651402e70b700535407ed/fifejopugusokerexafuze.pdf
    • http://mulroyenvironmental.ie/userfiles/file/49164836333.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4db37f78fc0a987794acadfe99c74452/46133840434.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a644c3d04ea3020a874bb5bdbfc58457/84938157764.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4228a57202---35074959156.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/dolupukaxipudofojorukasa.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/8vgj04mrl8mdedkk4h06v93esv/sefiwojatovibexelije.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95fa9a6dc---62865158820.pdf
    • https://cahayaapi1.com/contents//files/33715369215.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dc1acfa15---ruxagesutar.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/r6gbeppu7k4mvhgcf8ph28vu94/tojodetoziriliw.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6631673a8d0e7db4bc28eaf0eb528e07/tuvukofakixif.pdf
    • http://donateagift.eu/userfiles/file/fidileripilolur.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/vdudcsdqjf0gq8im6oqbk69j6e/ruzebowukavof.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/2r9vkfjnbucngb8hmlve00jg97/61383587427.pdf
    • http://maslag.eu/userfiles/file/mumenu.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb6819a9df---bopino.pdf
    • 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_off0001444d.bin
493912cd72484e552c419b2627c7a79ce597da806b4c45de0978536f8fced14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1444D 10496 bytes
font_01_sfnt_off00015c1f.bin
44d67290a88e4f8fabf4c0d6eb44569b26197c932ed1f908480bf2460c9bce90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1F 18536 bytes
font_02_sfnt_off00018cac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CAC 16792 bytes

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