Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46ceae40a8bb89b…

MALICIOUS

PDF

83.8 KB Created: 2021-07-08 08:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 54f68377aa261df87f6430e02915442f SHA-1: 1ec9a586cdad8ea6dd9bf108179f6b6df145e389 SHA-256: c46ceae40a8bb89b941fd00528229cf1831ff6a69a71dc29a82fb5139bbfe467
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://huntic.ru/uplcv?utm_term=basic+concepts+of+mechanical+engineering+pdf PDF link annotation
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/m1fcjhnhophrpg5vrih694mpq2/gonufufomudinimixure.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b0ba6a77---vigudixewakonob.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/5fc5c8e0331a3601246393c3fab5bc78/ligokud.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/f03110a0208502ea0fe0340af38109e8/xutupowoluxixanofim.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0372750b6e---zekopimitobo.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/00a46956fd6d1f26e0f2d7a868fa2234/watapisisegopagulu.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/xowekelagajagefizokuni.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/55944977509.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e55b902c5a---sopuwituwab.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090385c6cd0b---39416699093.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/m4afh7op1tidml2ns8134ga7lk/bimizofigor.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add9ca4a492---pobiwavexagopugawomosa.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/51c2ec597b6b3aaec88fc70e9372e2b4/36543571773.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45b36d6e9---malobitixagiron.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/38fa6ebb05d93797816b37954a87a001/lotavo.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072daf28348a---gibabukub.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/10904655230.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/54767174777.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ea02f99d177bdf66b2ed0c977ca0f21/toxemovovajumixibuvil.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/0munqgj7kbqnvit4ijbueieej7/77665104436.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/12/files/53379706787.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/c45c767f08e57c7661e5080ffbedec94/masapuzivoti.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/355940cfb5e93749aab984f5a93d4c8a/lekixerivojumulemopemit.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/90453365884.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7713ad7f---fakajiwisinufames.pdfIn PDF document text
    • http://tms-operation.com/upload/files/57628435152.pdfIn PDF document text
    • 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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 11120 bytes
SHA-256: 58b726baebde5745edfcba75af9a66c07fd14589ee3be4e029c55407e3b3bf34
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 16736 bytes
SHA-256: df3ebccbf019a38f8a22857b1f7ae453d14f4f973a41ac954f87d574f63cfe7a

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