Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3a0334f470bd21…

MALICIOUS

PDF

79.3 KB Created: 2021-09-07 05:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f07f0cc9f9f34301174b3420584009b7 SHA-1: 449106aa6f3c3d4f45baae2262032927e27ca42e SHA-256: fe3a0334f470bd21f983d435df4e534ebeea8a049114de167c40e6edbdc2d3c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit users by leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://www.og2c.com/images/file/domixevutidevom.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/fasopodopofixusus.pdf
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/77112341223.pdf
    • https://socardan.com/userfiles/files/88105388972.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812a2507641---kaxefobinivoz.pdf
    • http://csc021.com/userfiles/file/20210629111002_t0fshw.pdf
    • https://lescourailleurs.com/upload/editor/file/dafifofizuba.pdf
    • http://au-coeur-du-temps.com/userfiles/file/tosenoz.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/efe4c4ca13e38063a84967ae1b1d9809/fodalijiji.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968b2740f08---begawogit.pdf
    • http://anbao.vn/uploads/userfiles/file/novemupitekojumizubipil.pdf
    • http://faurau.com/luodan/images/userfiles/file/56150997821.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/e7ff34d13ed153f0a27e2779b21d39ca/44642469697.pdf
    • http://luberoff.com/userfiles/file/4859417646.pdf
    • http://elitvorota.ru/f/file/vosavajedodozujupub.pdf
    • http://asbazainville.org/userfiles/file/xuxewerovajezi.pdf
    • http://www.aadhar-interior.com/userfiles/file/167441434.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095d622c3e69---delelubeguwe.pdf
    • http://phongkhamthienhoa.org/images/files/73504294852.pdf
    • https://ost-fogging.com/upload/files/fupakotokivesuxip.pdf
    • https://pepinieramontana.ro/ckfinder/userfiles/files/90893991717.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pif4s9gaqcjer7cv699krohar6/52680476638.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fovazaxotukabegususisekiv.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daa6c288ccf---kakefazigubaj.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160beb7caef88d---20493488157.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=managerial+accounting+hermanson+solutions+manual
    • 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_off0000cecb.bin
69948cb217b34391f34719f869cf48aa7e7c7cf754bfb48b7c97c1127d6ec02d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCECB 19044 bytes
font_01_sfnt_off0000fee9.bin
55ba15c60a92f1af61d94e1e57e17a35e4dfc008520056289b7fcd23e9428136
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 10768 bytes
font_02_sfnt_off00011780.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 16792 bytes