Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea6194ec6187663…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 22:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74f372b96ee88bb6c4b5b13cb88b9c41 SHA-1: e2556e9b9d3915d6939ba7bbffada31e438e0553 SHA-256: 8ea6194ec6187663cb604fa05fca280d3c6f5ee40d0e913854e6eb0ccd9cdb5d
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The primary attack pattern involves luring victims with promises of prizes or funds, a common tactic in phishing and fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=trust+your+self
    • http://bfr-bialapodlaska.pl/userfiles/file/daxedejuzaxoje.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ab478d74---luxitof.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/m5m5l52ftiq8h2qdk47n1960or/97350274659.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1943bd844e---ramufevo.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847354082bc---82378173525.pdf
    • http://www.centralperdana.com/file/rujefijorategope.pdf
    • https://kalyna.ua/sites/default/files/userfiles/file/72590925468.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34de51c4e---45848738846.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/engdl7k7rafv97npk8qm9gqgdt/ladurotemenosutiniluwuva.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8815c4e347---mitufirepizuxofebuzezujos.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/situpop.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a8fed2831---76621449531.pdf
    • https://himalayanthailand.com/image/upload/File/59258840839.pdf
    • http://ahkkpcm.org/userfiles/relinimarawesuzelob.pdf
    • https://asiarsolutions.com/userfiles/file/88797958834.pdf
    • http://amandamaitland.com/images/file/30234613686.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160814831d4359---42583474760.pdf
    • http://iglozawiercie.pl/zdjecia/file/37678669912.pdf
    • https://nestuby.com/userfiles/file/tezijot.pdf
    • http://kleinschaden.expert/userfiles/file/70574401988.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6304a97c11---mugorepovukigurojovu.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/m4m2cneld4v9ev6rqcdn4vto6a/ledera.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607587dfd04d4---pejibenip.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb274e2a34---24615116670.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160791d309434e---zoraxawoxonomirudu.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_off0000f105.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 16792 bytes
font_01_sfnt_off0001091c.bin
33e2e4564e4f2704973299cbe16aa73da35ce48688d11baf1d2774c8044cd01b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 10028 bytes
font_02_sfnt_off00011fa2.bin
518088291850e17b771d01084c037d0f24b6aa36c04a3d8a6b3d7c64848a463d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 17328 bytes