Malicious PDF — malware analysis report

Static analysis result for SHA-256 242daf772881d281…

MALICIOUS

PDF

85.2 KB Created: 2021-06-25 21:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 233860b334b1e54c2ff78698b7d6cc53 SHA-1: 9fe013200073544b5bd46c3ea38a89f652c0b0c7 SHA-256: 242daf772881d281361277de32940aa7ccb0200bda6b5dc9550cbfeed53d878a
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to drive traffic to malicious sites. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to the overall phishing and malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/92be5c1db796374dabe9014c0552dece/57280073111.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bof97cg16cf7du5s0626remmj6/togovesefevijepeveziz.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8cfa9a19a789e450802cec7b07c444f9/17156928511.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d360c823920---80351304805.pdf
    • http://sincaremedicaltour.com/js/upload/sexixosox.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8936938837---putemuvizogafif.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1d6bb6c6---baxolodusosikakozifoxage.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f51c7281---dijuxudebi.pdf
    • https://alakharia.com/public_html/userfiles/file/9167126548.pdf
    • http://thepnguyentran.com/media/ftp/file/komisolotedodefo.pdf
    • http://curry-box-deluxe.de/userfiles/file/fifewolipaxeremesos.pdf
    • http://kenshopvn.com/uploads/files/mamolorapowagurem.pdf
    • http://agendatourvietnam.com/hinhanh/file/29271006654.pdf
    • https://wendi101.com/userfiles/file/65536834396.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/cee6a06c9659b55d90ff6962ef056a86/61769385167.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6b05c10c107f2ca58e52ff562c50aacc/51634035327.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160853154e0be6---58311177222.pdf
    • https://dijitalsanat.link/upload/files/lanofawutafifiwekekur.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608514e872f86---sedobifaduvu.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b253525441a---14659558908.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb60d1d0ce---28384258388.pdf
    • http://burrburroughsfamily.com/clients/55468/File/pematazupiw.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1233f01d2b---7113590116.pdf
    • http://pechati-piter.ru/userfiles/file/sifexe.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/54466910927.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=milk+tooth+going+grey
    • 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_off0000edc9.bin
31ee274eb3cdb39fff45c80012f8d30fc2af9a229caa99efb392bd0fd19fd0c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 10256 bytes
font_01_sfnt_off000104c1.bin
cf84f6aaf7182da18f9fa5c0f6b0da303f402469bbc768666fa5534bcb020852
pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 16676 bytes
font_02_sfnt_off00012fbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBC 16792 bytes