Malicious PDF — malware analysis report

Static analysis result for SHA-256 927625a84d40d670…

MALICIOUS

PDF

86.4 KB Created: 2021-09-03 18:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 530e9d7e0cfef3d43b4261bf474e0240 SHA-1: 31959f04513141986eeda5a0c7868b43cf28e115 SHA-256: 927625a84d40d6700ded52143c809751d58799837e53da53821a4610c6a689a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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 http://gaestehaus-am-erlkoenig.de/img/editor/file/pudukijetetu.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/9e9f381076fe6b1651f81a7f9b18253a/46248130537.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e12735699---siwowilisevazotojax.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/cqgev3l5b3p6jqlttpd6r7794c/jodewugemot.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/246b973cb9215270bfb4b9fe632f5483/gowogo.pdf
    • http://harchovyk.com/userfiles/file/fapunipezojidebodexen.pdf
    • http://abwmarlboropike.com/uploads/files/78604446620.pdf
    • https://digireg.nu/upload/6131295553.pdf
    • https://gamma-electronics-eg.com/userfiles/files/36597503044.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/9ebf28ce25a5ebfff62e5a2cd3691e71/95658215498.pdf
    • http://monroe74.com/clients/871877/File/kivusos.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/92186894369.pdf
    • http://liburnia.pl/userfiles/file/rukirotozavelal.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfe7a1725---lomakum.pdf
    • https://a2designbg.com/userfiles/file/jitetazeru.pdf
    • http://mobiliteit.nu/files/12230213849.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f49de03fab7f2a965066da41f3bfdf28/xikadaxa.pdf
    • http://banghetretruc.com/media/ftp/file/4905212145.pdf
    • http://budaikepkeret.hu/uploads/file/71113503223.pdf
    • https://ysh.my/userfiles/file/bovubosij.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ce1ab8b35---lemuvis.pdf
    • http://www.ecostroyservis.ru/File/55988567907.pdf
    • https://evpersoneli.net/ev-personeli/file/19872496823.pdf
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/18145301595.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=importance+of+food+quality+assurance+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_off0000ecc3.bin
46a8632f62e4034cc177a7b319eb3866493dfa6a6f5273287024b6ad516fdab9
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 18176 bytes
font_01_sfnt_off00011a30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 16792 bytes
font_02_sfnt_off00013247.bin
0a62828fc90cac34f962dbb6f4c5e2ed4749239c3176b4fc65d6fa55c13627d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 11092 bytes