Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7702b4294af507…

MALICIOUS

PDF

88.2 KB Created: 2021-06-25 20:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d924784a673312043a6d1af642c01fc SHA-1: 425db994051dc56a31ed76ee63ec298670b00426 SHA-256: 9d7702b4294af5075341226c055771f302373b7a82cc19627789f6e7e15f8f55
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to potentially harmful content or for SEO manipulation purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/acd8ecf72126323c7e3f122b33bcd40b/52278578058.pdf
    • http://tecsun-moscow.ru/docs/file/95589082477.pdf
    • http://infrabud.eu/fckpliki/file/madabawowunorasufokazo.pdf
    • https://nnkcreations.com/userfiles/file/18599930938.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1a68e0e74b3b791c7f26717e68a9e5b8/razizikojufoximo.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7ttnbble7vr3ov4ao3bj04jom4/8744461660.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/76a806324c0e0ebaaf85e70228799c48/zezaxopeboxuruvo.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/f0c2bsl71mbohefvofdnk9ten2/kimarafefoba.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096f96c5bee0---mafusapiraxuwizo.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd0d7afe6---denetamopu.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/65eb518de25999c785c1eb12e10215b1/xinejepira.pdf
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/84742958698.pdf
    • http://bike-aholic.com/UserFiles/file/pifob.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/d313de7e13858df1e2981b68d1b999a4/20681830947.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4m7q95ocs9b0584tadphcilv8n/40765393416.pdf
    • https://palcev.ru/userfiles/file/62249460363.pdf
    • http://energo-market.ru/sadm_files/31149430064.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16097cf98d0b42---bikomugegalogafazu.pdf
    • http://bright-mineral.com/uploadfile/file/2021051407074439.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ba8a24ef4---7596578544.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/toejohvtil0v8r253ovg15gb0c/63784925786.pdf
    • http://pileshoppen.dk/userfiles/file/830040896.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825b376d49f---56983316198.pdf
    • http://czpohledavky.cz/userfiles/files/lefifakose.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=height+and+weight+chart+for+teenage+guys
    • 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_off0000f5bd.bin
9d3977a5f2ff2a23b286e60627fef2df5c1c99b5978ece48058b8371d85a1c57
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 17080 bytes
font_01_sfnt_off00012229.bin
0409e2abb8be367544d20adb7ddb561fdc89ddeda45e4775fef39451961413c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12229 11000 bytes
font_02_sfnt_off00013b85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B85 16792 bytes