Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec1aa9c32c7571e…

MALICIOUS

PDF

108.1 KB Created: 2021-07-01 00:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef61b358b102479b1f756bd272d2beb7 SHA-1: 64e797910ceec88c2652b09e2128085760be0365 SHA-256: 7ec1aa9c32c7571ee355eb0b95fa047678bba08dbd1a5ed452f4fef28973f2e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites, specifically targeting the 'formcraft' plugin's file upload functionality. These links likely serve as a link farm to distribute further malicious content, such as other PDFs or executables, to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097282c98ab1---94766774782.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/kijumefofowusefotemixetal.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41aef04541---86789227683.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/q8o5059ljfhdbntd7q193jbdj2/29261785040.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6401117d---pofepokejexolobovimeziju.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/644d06c9b600e6794bb26efb92b3170b/78313670943.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab889eb4b36---61204000828.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/hk7464ii5d8oufo8d3t6tif01u/jomawogile.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/4t7qetf4dp2ugl29edb6l5r0fp/sezotejitibirekalakanazew.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495656a344---7031910274.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afac77c86e8---xixijulewobeva.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4300cd40fc---55231831745.pdf
    • http://cezanart.com/userfiles/file/xuxikilupabijaruv.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7f2b3f420ccf86c538bb2876034b92d5/zorefabesasamesogog.pdf
    • http://colorfulmedia.de/fotki/fotki/file/tipisitemeworezineb.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d8eab877d---negebebu.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/221dacdfd3ba86c41aa096c4ca75ddbc/12949765161.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=about+ajay+devgn
    • 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_off000141b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141B1 16792 bytes
font_01_sfnt_off000159c8.bin
00da6059e27762174b81f60fea7a8c9fcc94aa4081dea3a98dc1f30f87555b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x159C8 10548 bytes
font_02_sfnt_off000171ce.bin
bceb84acefa39a927bd506e29b69486f101e652f39059717368087512c19f9a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x171CE 19456 bytes