Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2e011b2aaef5be…

MALICIOUS

PDF

81.1 KB Created: 2021-06-26 01:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a10394f33f65e2edabd5c11e5c3e5e7c SHA-1: be782e3caaa0d6b2b15afe0f7c7fb7654dc3d8d1 SHA-256: ca2e011b2aaef5be43a7378c635dd59725a549ee5a81e4463cd7e9f964eebb90
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The document's structure and the nature of the URLs point towards an attempt to exploit user trust through a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://nanyangtextile.com/userfiles/file/rilebataralagaziselawak.pdf
    • https://tecnicadovolante.com/images/file/98134720165.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607026cf43508---74712072713.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ftdnofq7bcobcc4vlk84i15mff/bemorotimisunitex.pdf
    • https://habibitours.com/ckfinder/userfiles/files/46127112787.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afaa1c4bc42---2731525830.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/41fd95ae40b9e2ad159529fa877a63d6/penerozopapubikuxog.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/712f77562f1d26f6763f56da8fcb1eea/bixanopafozibiwowiv.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b5a3fc05c8e55999eee14cb164a92079/52005797242.pdf
    • http://auburn-properties.com/userfiles/files/jomabezobutolulav.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160993d4a4bdfe---86875296013.pdf
    • https://ovalpolycoats.com/media/79142361806.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724322454d0---62491426750.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/c26huhhvtfdh06dkjvqfaavvb0/vibobujipibibakegez.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf4499ca7c---25912562475.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608643775631b---70727634351.pdf
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/25953322495.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/afa1c48d856897b409a8895ea1dc2a52/vokasutokunenemajawised.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7183orfkgdmbn3c75p7jao8cid/muwiwen.pdf
    • http://worldofpacifiers.com/editor_uploads/system/files/navotigafixawixapenomi.pdf
    • http://foodchemsino.com/d/files/wumodenimogenubawilokuze.pdf
    • https://muguet.fr/sites/default/files/file/fojutojado.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ace31e3113d51377a20b2f50c75fb7ec/88560823729.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=5+kw+to+hp
    • 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_off0000df99.bin
3640bf17f434efc65992a12598f443f93dc74af541076d75aed05e9df5168440
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 9760 bytes
font_01_sfnt_off0000f52b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 16792 bytes
font_02_sfnt_off00010d3d.bin
496d8fa2e0b93d337e8c042dc6bd0929964458b68c933c3423d529da7a5031b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 16392 bytes