Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fff22c5fb2f159d…

MALICIOUS

PDF

93.7 KB Created: 2021-07-06 13:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e432898cff2e4b2ced9d61c1d1eea7a5 SHA-1: 63be0db2120614dbb87a662bc0eff569b524773d SHA-256: 2fff22c5fb2f159db767448e058007e3eb375cb0580ce67714ef17ae8687d7f8
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to websites, many of which are hosted on compromised WordPress installations. Some of these links are specifically noted as being on compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of urgency language further supports a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a9373859---rebatijawosolotugo.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/94938290662.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdae1f82f0a---juvopovaje.pdf
    • http://wowbond.com/upload/Fckeditor/file/82690269780.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0e0740415408b09b2a4fde04ab6086c5/73780064309.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/04b67c6721f4433cb6112fd1e69522c1/zedof.pdf
    • https://asthasupermarket.com/userfiles/file/kaxapifukibibefona.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a30f15d129b---nikamet.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7de9f375ff---2079458993.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/43240741430.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757c8ea7415---8987908156.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6262a7771---sefolowo.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d89cff27b3f---vugadarek.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985428d306c---nitefoxegilawa.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/319101e1a583033dacf2154c10cc1038/47888494091.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/eaeb07c2b75922232e33e3db073aa62b/3694602563.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ee2111d7---xegugiboxedizuxabekibota.pdf
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/44479399048.pdf
    • http://eot.mn/uploads/userfiles/files/supobowamub.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf597bdd7e---towenupufumavogidowe.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4503e0c2f---70237260398.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076745bed282---putageludubureb.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/namobiwunutilijewerepow.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f5bd37b8---99854302876.pdf
    • http://brette-animation.com/userfiles/file/bewukezivuwezonoz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+time+to+see+the+comet+tonight
    • 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_off00010c74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 16792 bytes
font_01_sfnt_off0001248b.bin
5a2a8ee32eb30a0eb0dc5079985053b99881c7ce108c54872b43c25c4bff0e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1248B 10524 bytes
font_02_sfnt_off00013c64.bin
2dbcc14aec72552fa19af0e1ebd5ad0c263476fc2da3ea484152861e4b23f244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C64 17492 bytes

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