Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af51479cd6020fa…

MALICIOUS

PDF

87.0 KB Created: 2021-09-21 02:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d6deaaef415ecfc4b83650810e1402e SHA-1: a951d5fddf400881fc9a8fad62cb0d7541a9c1a8 SHA-256: 0af51479cd6020fa21bc6577897346bf2fb754f006c15915aaa42508b3e5765c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maintogelonline2.bet/contents/files/7379117431.pdf
    • http://vitacanes.com/uploads/files/fodebutosunifi.pdf
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/tonuzagitipawatuza.pdf
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/54869354365.pdf
    • http://squash-fitness.cz/userfiles/file/garavasimusidiladexoluzi.pdf
    • http://alianzablue.com/aym_image/files/wanaf.pdf
    • http://fvv-hohenfelde.de/sites/default/files/files/siziwivixikilepewerimitor.pdf
    • https://flexi-cms.com/uploads/file/25095394861.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16142dc66025ae---15411610928.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1c76fq7hkumoimkf9og47vrluj/17838928360.pdf
    • http://alfavit.tv/userfiles/file/82522531592.pdf
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/rowogoxafirewemuli.pdf
    • http://geometrarontani.it/userfiles/files/ronezenizasiduvefebe.pdf
    • http://oodow.cn/upload/file/210916055445553900ahpw46rf2xyf.pdf
    • http://ngnjl.com/userfiles/files/wiluvadudikixemonafolo.pdf
    • http://lulanjina.net/upload/files/dubaludojozisov.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/gobifovibupofu.pdf
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pokufabezujimijef.pdf
    • http://eot.mn/uploads/userfiles/files/xibezosojimif.pdf
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/samew.pdf
    • https://ienter.bg/files/34897988551.pdf
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/mafawokafelijirivilero.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/risikevotij.pdf
    • https://hizlipin.com/calisma2/files/uploads/lojumejivov.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16146e5ee66fe5---38505174502.pdf
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tezaxazexawu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=streaming+apps+for+firestick
    • 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_off0000ef13.bin
2ce2eb2bcccc26dae7d2dd1eed031cb333f56f4d15940a45833d131abf68d013
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF13 17756 bytes
font_01_sfnt_off00011c64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C64 16792 bytes
font_02_sfnt_off0001347b.bin
0fc223fd087c76f4d2040384041cd9e5687a48c23a9f3a37a038df91d36c0994
pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 10944 bytes