Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5d63f848ab8c24…

MALICIOUS

PDF

86.0 KB Created: 2021-07-09 03:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12c48d752eaaf3ab287f38cf5187ba72 SHA-1: 2a0d5a7a0a8dac906662d2668d3627f53d6ea052 SHA-256: 6d5d63f848ab8c248df1cce2b3f1efbf769d8fc7ac0685f53355c7711938adff
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://thesnowmanicecream.com/ckfinder/userfiles/files/rikajisimas.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/eba2699159d4fe7816e585987ec9db8a/kelulixibefowen.pdf
    • http://ourpreferred.com/userfiles/files/zukojibad.pdf
    • https://atlastoursntravels.com/userfiles/file/parokawebuvoxomojoz.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e124192b6f4---fisetejoginix.pdf
    • https://louvre.lv/res/wysiwyg/file/46626163357.pdf
    • http://thedewakohchang.com/image/upload/File/ibileguzutuvidowunem.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56fa9e0e4---13982943756.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a934ea6b776---68014130531.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/347e28c85f0c93ba37916b2dc3bb4adc/wudatokifedifuzigoriz.pdf
    • http://perlawarmii.pl/userfiles/file/molonodapusefa.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2de39ea163---warikevabesokolenez.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bc70c20f5849b33e63ee084553c194f8/sunakaka.pdf
    • http://chiengthai.com/file_media/file_image/file/58393007771.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ec799697d---15198812323.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090452a3dcb3---11703387018.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/30fcbbb86a2f45edba45b9ae69a785af/novuzosugidepijuxoro.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/digexiwalemujirikitob.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a441258e24e---36321728993.pdf
    • http://karunb.com/UpLoads/files/98495773415.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a9dd87adbc3ea57eeb71b3e64c94e33c/widuturikobawoxu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+filters+to+use+on+snapchat
    • 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_off0000ed50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 16792 bytes
font_01_sfnt_off00010562.bin
0885cd1b9921e480892fc1b00e2defe12ab57a067a2539662c7f69aad6609891
pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 17188 bytes
font_02_sfnt_off0001324a.bin
1f68fe6bc4ec1b01894ff3e8c234a23de21d244f4139caa0c2afcfaff9313922
pdf-font-stream PDF embedded font (sfnt) at offset 0x1324A 10728 bytes