Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee04d394dca17ff2…

MALICIOUS

PDF

82.2 KB Created: 2021-09-20 23:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a12f570c601a031048f7e23f5c89df75 SHA-1: e44e0f3836a73b3e6117a13b8e4df0a7583d2f9c SHA-256: ee04d394dca17ff2eca75bcd5a2626d52c3362c64c44498e6e37f4527e6ab1ba
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gainliving.com/upload/editor/file/53674008663.pdf
    • http://geoass.eu/userfiles/files/romufedewafapida.pdf
    • https://ferado.vn/userfiles/file/kadarenamasupokukupew.pdf
    • https://edubox.mn/uploads/users/0/files/wovenesosezefow.pdf
    • http://iranjobex.com/cache/fck_files/file/46968802665.pdf
    • http://gruaszarate.com/ckfinder/userfiles/files/39713987989.pdf
    • http://thsport.dk/userfiles/file/bebeno.pdf
    • https://gizaviation.com/uploads/files/19479976962.pdf
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f7c1ed59d---5940320324.pdf
    • http://chinalabware.es/d/files/32487537693.pdf
    • http://integrotech.pl/zdjecia/file/xozoxupozuxemisigerumutu.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140e89ea2a30---vezasatow.pdf
    • https://osakaav.com/userfiles/files/wuzinideva.pdf
    • http://studiotecnicolari.it/userfiles/files/gebulutadebeporogiw.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/db76f0ba058c3d01d310f0d29dc6c729/ginavexozuse.pdf
    • https://12shio1.com/contents/files/37710526415.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/086a2dbedcf4979accc1a34ce3e0bf11/jejegakiganaki.pdf
    • https://greenfuturevietnam.com/Upload/files/xakipovizagap.pdf
    • https://idealist.ro/userfiles/file/89899006870.pdf
    • http://yanartekstil.com/firma/files/95192275007.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b791e768bf---92800683900.pdf
    • http://xahuaheng.cn/userfiles/file/95304695510.pdf
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/95072176625.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=justice+league+2020+full+movie
    • 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_off0000d61e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16792 bytes
font_01_sfnt_off0000ee30.bin
4e68a63773c156f0a5809e8dbb37cf0a59315fc802148d3d2d303a86937bb9be
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 19864 bytes
font_02_sfnt_off000121ad.bin
31a179894e9bc35bc7ca5ea66bfaf5b47e3718a50e9a4b55c52a10667cdbce71
pdf-font-stream PDF embedded font (sfnt) at offset 0x121AD 10876 bytes