Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0a304b06e2eec6…

MALICIOUS

PDF

90.8 KB Created: 2021-07-26 20:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ba0c865736622fc66e812ad5a94cb505 SHA-1: 506c232ed27e8913480a876119f06a4de1b8de54 SHA-256: 2d0a304b06e2eec6c1bf33d2459a669d668dc1a6bd46782554bb1a1f0138bcba
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and a large number of links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/30ff55b1cae2ddf0c0818c66c9da3b8b/72255442433.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e467e5c12---88892977730.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/t6a5bqree51rakmplvi2b5ljo5/rorivoxe.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210619063035_dlw7rx.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1e4e4f29---xibadoxeg.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/93805720415.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/besodewujewonolemanexepe.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/26426440982.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/kogibogemuvegegunirope.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/83678216991.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/bobabutevogifabuxakab.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/webazasijozuxizobevoregi.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/lawederijigaso.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7ee3c98e5---41343291845.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/95a840b7af49b867b9908049d16ad945/fanalezeniwinuludiselo.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/busavoruwikiriv.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/61749522558.pdfIn PDF document text
    • https://ei-hotel.com/free_images/files/filegukegimobu.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/26972539505.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/11526794216.pdfIn PDF document text
    • http://allycatering.com/userfiles/wamejemuxir.pdfIn PDF document text
    • https://laser123.com/geektic/files/rifisetudekovazuruzokev.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/91251303389.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a087e73ed8e---33270815160.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/80200047243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=el+leon+y+el+raton+cuento+corto+moralejaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 10456 bytes
SHA-256: d675bd5358c6a997a985206a6449ffdb448d1bc7b72f9d03372edad867f242bb
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off00012c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C83 18144 bytes
SHA-256: ba7c14dd7d019c786a491e0eb7f95eeaad70c8707acc231d62969694db23a06c