Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b2eb7ba39fe7ee…

MALICIOUS

PDF

82.6 KB Created: 2021-06-26 00:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c7a22f29543dd33518ddca5dbf1aa3d SHA-1: 0b2dda93b282a95b9118007a30c8b285366a5d0f SHA-256: 07b2eb7ba39fe7ee6cf42f97e89ee19559b3ad55813b35205c8a5cb8981b76be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of multiple distinct hosts and a high number of PDF links indicates an attempt to direct users to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://arvikabc.com/images/uploadedimages/file/85172559455.pdf
    • http://aliceinformaticasrl.com/user/pages/7095696542.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df712afb5e---29970072346.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/9a01c9cab25e7864c46bf2a7637ecfbd/49070843209.pdf
    • http://espacioschillout.es/images/admin/file/8324283185.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082baf60b0d1---9084970317.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a171464c3---44804050802.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae716b3ced7---tusotevifugakekiliwaral.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/44nh4ve04vkl91lmrf25rqh9i3/xuxagifozoziv.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/3ddd5e5086f9bf6406b2662f4c0e8caf/tigezipukivu.pdf
    • http://capital96.com/userfiles/file/joboz.pdf
    • http://school19-zav.ru/userfiles/file/13421500202.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/e79bj24fjld6jbg7gasqhpieem/zusuxolazarawagujilazepu.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8df9e07de60e6f764420eb9f8d05687f/pitotofu.pdf
    • http://charivne.info/images/file/guzuwuridonojevid.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a437ff0461a---lageremabiberesimavudasu.pdf
    • https://ubranni.com/uploader/files/31904531043.pdf
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/46208436215.pdf
    • http://aeronautike.com/userfiles/file/24533342183.pdf
    • http://4grd.com/cmsimages/file/busakijuwimomanigexetutig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=7+up+game+in+school
    • 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_off0000e320.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 16792 bytes
font_01_sfnt_off0000fb37.bin
b658b26855cfa2f0b5cc90a89a17cd16f9865442275eadfb234ee4f4c60fea3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 10676 bytes
font_02_sfnt_off00011370.bin
070758fa62047bf3953e1591ce93351c50f961ef8d78c6e2267c99dc6db62ede
pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 16392 bytes