Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f9af69e119be8f…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 14:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4182ce80c961a594125ad4aefc5e4c43 SHA-1: 571e523c12186476a83c4189d46319f21cab7e8f SHA-256: c6f9af69e119be8fda1dce61fb28dc7f76779d37f38d142130a5320d612cfc03
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a specific detection for advance-fee scam lures. The document body is heavily obfuscated, but the heuristics indicate it is designed to trick users into believing they are receiving a prize or parcel, requiring them to pay a fee. Numerous URLs pointing to potentially compromised websites or disposable hosting were extracted, suggesting a distribution network for this scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 http://hainescentreasia.com/images/file/71962254205.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/he009kcvu8pchi2es4b5j1a049/75462256067.pdf
    • http://yesilderecine.com/admin/editor_resim/file/firilujilirisigo.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607776dc99715---68390537771.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ctp3gs2h05htgea00m6qg5b9t1/13647861171.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/wijedixujef.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a658a833---83369240333.pdf
    • http://almar-bus.pl/userfiles/file/73367417223.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2a8aa9e56f30725e44036c7732617eb8/nevabapiboviwutuwevejubaf.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d2a90f882---jogolukimavojubobata.pdf
    • https://gachbinhduong.com/upload/file/45424522142.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/5c2c059dc80b9c371e06fd19f29ceac2/poreguwifutud.pdf
    • https://uleiuri.ro/userfiles/file/ziretun.pdf
    • http://bdaudit.ro/userfiles/file/26697294764.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ca0467b5---92321782101.pdf
    • http://azizolace.cz/images/file/zomiji.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160802d3af04e9---rojiwodudededujapazitix.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f075ee2038---60239309090.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7cb9f82c---16079654890.pdf
    • http://nedirajtebosnu.net/userfiles/file/luxurogoterijupo.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084428ea46d3---ferumiwepapuvozedonutob.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf5f044d6b---29483223159.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/r5ekq6pjpnmcdqeb5pbtou0pa1/mexofug.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b5c323401c721e031780664010a8bfa7/56976262023.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=non+qualified+stretch+annuity
    • 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_off0000eba1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 16792 bytes
font_01_sfnt_off000103b8.bin
375382b0bdcf6581f13f65d88d42522b677b610ad8895fd3c437d45ad23bfe36
pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10908 bytes
font_02_sfnt_off00011cbf.bin
d9b6f7f02e6f3511d1f867e616f573357df22be39224532275c329a2102a186a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 16816 bytes