Malicious PDF — malware analysis report

Static analysis result for SHA-256 59569e2fdf6b679f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 19:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c2193f7dec0935dc5a738b4840e22e94 SHA-1: b8e02ef4a1e125ebf7688fb4c5fecdd0dd81fad8 SHA-256: 59569e2fdf6b679fb69efd9d368c29dfdb5c99f3286acf7b2623327f09758f1f
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to further malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://sitoad.com/bbqjoekey/files/202106051025452730.pdf In PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/62eca881971b3657ab49f72edb48f26f/90893913684.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bb621f4d345d79327a4313755bf2d2b4/66156579836.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/35606265504.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/gunawewojorazidebivimi.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/297ef98ec2f7abca3db6824f8e5f00ef/baxotisavofedeno.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/kepuk.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/55dc577a7c6b8939202d2b4040aaa3ac/49884857628.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca9091a864---30832387977.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/n9sd8es4qram9p34rbskoulvf7/94207350311.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/luxivisumazawaverozoj.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/50618011940.pdfIn PDF document text
    • http://360global.ca/userfiles/file/33625810024.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/92658969306.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/62dd4d56b003e8912880eb41c459332a/57704350252.pdfIn PDF document text
    • http://anninh247.info/upload/files/10017396698.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dee10a4a8---96812866702.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec7282d97---fepawiwiw.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/80724794375.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/51360559117.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ob98vj88hp111r3k8fo4b8eb36/xejowemu.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/jetulexewazotegoluzep.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/31276730064.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/733b39b6ee065f37ffbb1d058718d127/bijewipisugedibuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=rtd+sensor+working+principle+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 17380 bytes
SHA-256: 2922c06c8824e800eb514a8db61b31a699df280da6151654e625779c753223b4
font_02_sfnt_off00012453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 10856 bytes
SHA-256: 61b7208a0ea8c9580f1f04e9fa2b6a8527ad4d6e432621053e8806787ae87a0c

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