Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6473b3ceb7b635d…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 11:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d64ac01c10fb58bea32906b866087e15 SHA-1: 185d9265f61b84fead773d1f091697e35c12868a SHA-256: d6473b3ceb7b635d1353ab5da097bcb63f7659d31fc5da44bbe5feeebecb05c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to direct users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=fresco%27s+fish+and+chips
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/jr6g95d5ljnj2m91am89372a24/1164650495.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074bbbeec349---lunoboxa.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/iv63ag9kuh4159ghp8ihhe6d94/10260347233.pdf
    • http://movementlab.dk/userfiles/file/30527885308.pdf
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210609054502.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dd165055b---verepelepi.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ce5924a8c---tuguporemuxefegawabibube.pdf
    • http://geredekombiservisi.com/userfiles/file/nawulupekoduzovubexem.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3815b4a3b5b492e4d88005b7a86148af/zonotilu.pdf
    • https://nikoljski.com/ckfinder/userfiles/files/xujoziwewupodiketop.pdf
    • http://adance0112.com/upfile/editor/file/lalit.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d52b29ce---bobexivuzakebiwitizar.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7fdedf9ae---tesil.pdf
    • http://cedule-plachty.cz/files/file/radebovirifer.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19f420a30b---kivimikuwoduxoguzu.pdf
    • https://atphp.ch/userfiles/file/mujakurov.pdf
    • https://akita-inu.lv/www/files/files/17359286739.pdf
    • http://re-view.online/fckFiles/file/xodadabijotaxow.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088083f82e5c---68706238792.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a9657483f97a649902107e9a26e73758/56529300207.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/dce86f20743ec12448443c74fe887e97/pizetegipalobiwenile.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/tvs81a8han05qm0eaisiglt997/rogeparo.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2bd284dda9daad3ed1032b9757537730/80157899072.pdf
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/20627307106.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a1243f5596b---22331105175.pdf
    • 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_off0000ed07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 16792 bytes
font_01_sfnt_off0001051e.bin
c6e450f3229f1432b983c7253092e800ef8caa28c9b878af46641b19e239351e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 10584 bytes
font_02_sfnt_off00011d30.bin
75e973806eee5cf33532ead663d2ababa3608f64b21b6233913645a8d71dc8a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 18032 bytes