Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf82ea3ff9e87d1…

MALICIOUS

PDF

81.9 KB Created: 2021-06-27 04:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de145290ec6061b432d892af12efcf46 SHA-1: 509687eee509db00b04c237f49dcad12c346953e SHA-256: 9bf82ea3ff9e87d1bbf7d66956b0363e442a6d81d2828f630e7e7c349d9a063a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c749d155c5e---88531245546.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab65d28f1b---46636914172.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82c2c0e7a7---mubetetomek.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099439b79ab4---ridigod.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/hb90nov6c2kqu9b3ejr6h5b4r7/97176148812.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/523a78836fb41c9c473feb3038954211/69051001066.pdf
    • http://turnyras.lt/Files/file/zumofulodijep.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070709919c81---97414790953.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f77c6e0da---goviwodebebuvuzibevenod.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3314192be3---54659786392.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f01d3e21---xirobewekukekofunibe.pdf
    • http://studiodabo.eu/userfiles/files/mefos.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/23fce8f5e9ce3a25df04595b06643700/deraxezaliliditebirive.pdf
    • http://yangpupark.com/uploadfile/files/39740045667.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb668b0bb---15153138553.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f603986d49---purazobizeropako.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/842b43cb0ea9bf77191fc38c3412e2c1/45330804560.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/55e5f77c9dd51822e8cbd8d33fad82c1/11082619385.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/dad4f4426e18e5593863daca2ccb3c7c/gududuwuti.pdf
    • http://s-privod.ru/userfiles/file/24775739304.pdf
    • http://seednseed.com/admin/fckfiles/file/zifedezavujomutufe.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfda153174---zinebi.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4e6d4e72---83213860491.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6937e691a---rotepubidurogezopumit.pdf
    • http://sevimticaret.net/userfiles/file/71905490824.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=convert+pdf+to+smaller+file
    • 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_off0000d986.bin
b53ec0efb6b8624de880f82b61e2f9050f7ac4d80248f51602dc6f3f7779dfad
pdf-font-stream PDF embedded font (sfnt) at offset 0xD986 10756 bytes
font_01_sfnt_off0000f248.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 16792 bytes
font_02_sfnt_off00010a5a.bin
b4946479ac9fe3c6955fc7543f8fb45cfdfffaf1deafd00b389dce6a26f23746
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 18904 bytes