Malicious PDF — malware analysis report

Static analysis result for SHA-256 121e63e147ed02eb…

MALICIOUS

PDF

124.8 KB Created: 2021-08-10 14:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cd7a6b9134c603dcdbb3e7f801fce1b SHA-1: 5df9c5ce10a10a014aad409b04cebd114239278b SHA-256: 121e63e147ed02eba9eaca898d3b313ee5be82ed8c19ab8030e22cf039e54f01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content or download further payloads. The document body is heavily obfuscated and unreadable, suggesting it is not intended for human consumption but rather as a vehicle for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/paduwevegazupotufapamame.pdf
    • http://pamatudarbai.lt/ckfinder/userfiles/files/xojevugekuvatezujeve.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/14c1456f1637427d10c9a0298bce8180/juluki.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c7a0e5799---48678430264.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f74104bf8206ea376229c80253ed7940/86572106849.pdf
    • http://paroissedementon.fr/upload/files/27622485458.pdf
    • https://mimpisiluman.com/contents//files/dolelaturu.pdf
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/dibota.pdf
    • http://sushi-belovo.ru/files/64813333355.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/aro39p409ar1m2fk06dn2i2llv/tisiraseparijakele.pdf
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gewitarikatar.pdf
    • https://fishuntpesca.it/file/taxomerawikugekedoti.pdf
    • http://stjconsulting.it/userfiles/files/62110269826.pdf
    • https://gmt-tw.com/app/webroot/userfiles/files/xuvudenavifivojawonaju.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7d397f833---52689367393.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/80234748260.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b009cb1a---94836068522.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/373525926a920d81d29341d77564771b/tajabob.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/252p9bc1gc30tdnebgoft0hc41/koxepikevadesor.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/joviripepaxigevakulo.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/f08d4a07fb51cb0d26c565c46eeb4c2e/96369545992.pdf
    • http://onnetsolution.in/userfiles/file/31980342143.pdf
    • http://tanphatinst.com/vietkiendo/upload/file/66078432462.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/2a1861b9594191bb47200ebcd3b2cdb2/46082189292.pdf
    • https://lacecinella.com/writable/public/userfiles/file/78422370923.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=radionica+a+ciencia+do+futuro+pdf+download
    • 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_off00017fdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17FDB 16792 bytes
font_01_sfnt_off000197ed.bin
7e19ea070565961d34b6c6a6572232170f9a367cd404d40c5cfd348db84d1bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x197ED 21224 bytes
font_02_sfnt_off0001ca07.bin
1827b88af56fec06e6bd7bd24ca0b75511a6a0e6fde4d2e96417e2cdf1019627
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA07 10676 bytes