Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf6464e55983d32…

MALICIOUS

PDF

82.2 KB Created: 2021-07-08 17:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da7f93c389fbaa24955f8634ed6c4ca6 SHA-1: 4562d95eab40d5e4a0ee55a5d0230128a3780bef SHA-256: 9cf6464e55983d329445fcadb9e92f7ac5c10bddfc41c8159e323e80c317bb93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various URLs hosted on potentially compromised or disposable domains, which is a common tactic for phishing or malware distribution. The presence of multiple links on compromised CMS upload storage and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/f2e223072427925c4de844a4873bac2c/16789886553.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/v71qfm2l4clpiqc111132fq9la/mijusosufetojalokatom.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/vetoxixejowamiben.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3c26c6a20---banigevotijed.pdf
    • http://stavebnevyrobky.sk/www/upload/files/67468443490.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/93b9789630463778afac4c6dcbce52af/jaxunubigerosumalexowi.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07522c8cf---42860615838.pdf
    • https://neplatnasmlouva.cz/soubory/wuvuribavowaboxadoru.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/23505b0315c5b471ba36d82dba116242/29794837625.pdf
    • http://simonide.org/userfiles/file/rokut.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16073d79c45d8d---jikamesetagomit.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160947d5f27475---rodogofososevukujavipali.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb997e5b35---vatugabobabavor.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c38908e0e---welujubimepekinemisoda.pdf
    • http://mini-garden.ru/userfiles/file/9473397789.pdf
    • http://allycatering.com/userfiles/refuxisuzu.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075441016757---lafiw.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/c1161d017c746037813e562be10541b5/masawerebe.pdf
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/92762707656.pdf
    • https://bacninhonline.com/webroot/img/files/vanajebu.pdf
    • http://klefmarken.se/upload/file/98336265531.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d4e264fb2---48704998043.pdf
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/24319213855.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e94b200c7---65433877011.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/94be304daf38fbe8f72c698e4b4ebdd9/51473616464.pdf
    • http://thunderstar.cn/userfiles/file/20210525032036607221134.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=and+the+guns+shot+above+our+heads
    • 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_off0000df61.bin
ece2bbb78951a623bec7f1f00c48bbd1a7b57ce49e18726000faf476e0856839		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 10676 bytes
font_01_sfnt_off0000f7a2.bin
5d18946df7fbfcc8f8fe97554f3822ca4513d9ef76c46aa8049057308ea235d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 16764 bytes
font_02_sfnt_off0001231c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 16792 bytes

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