Malicious PDF — malware analysis report

Static analysis result for SHA-256 adafff2f0c54048a…

MALICIOUS

PDF

82.1 KB Created: 2021-09-22 20:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fe0ca82bcc915ee24a493fcc9b4403f SHA-1: b6d8aed2d69f3bdc09f86047b2b8e0d32acb9719 SHA-256: adafff2f0c54048af1549e176d53bf06d26ea434a85b7a48d309caf90b2a605f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting. This suggests the document is designed to redirect users to potentially malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=smart+watch+fk78+price+in+pakistan
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/78571741413.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a240178474---ruxenidu.pdf
    • https://sanipro.ma/app/webroot/uploaderfiles/13617698460.pdf
    • https://ka-base.no/images_students/files/jixebojutegu.pdf
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/83954373405.pdf
    • http://lionsmarsala.it/userfiles/files/wutufot.pdf
    • http://constantemails.com/userfiles/file/1630975888sumukapisutitupikuwo.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16145be93c3988---dexuxevaferiza.pdf
    • http://cascad-trans.ru/files/gifalebukenudi.pdf
    • http://tantos.jp/js/upload/files/64571816076.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404e85a07df---saxefulumesasuvaduzal.pdf
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210906_191418.pdf
    • http://agrihitech.net/media/ftp/file/54817782627.pdf
    • https://sofupingame.net/calisma2/files/uploads/47203096130.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f9031320c967bb62c8fee2e203bb6441/45973779963.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/mavumov.pdf
    • http://getsolarny.com/userfiles/file/dejageme.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a0c96c7744---kabiwunekizitekejix.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161363ff316575---38528353426.pdf
    • http://bassonconsulting.mc/userfiles/file/wefivovafobog.pdf
    • https://tenderdiary.com/ckfinder/userfiles/files/lojejaji.pdf
    • http://indemo.pl/Image/files/wasefi.pdf
    • http://gotoippc.com/ckfinder/userfiles/files/27064903098.pdf
    • http://dafangtour.com/fckeditor/userimages/file/39548382682.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/ruxupu.pdf
    • http://machinesupplier.cn/data/product/file/2021917_52312_252.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_off0000dbfb.bin
0bcc1816aeaba385c25880905f377ec8ba9ccef047ecd828abe34389be493060
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 11088 bytes
font_01_sfnt_off0000f5ba.bin
549b77ce36ed906aa353b0092686cb72c5024b72451c4a7e69b836c5f9c811b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 17468 bytes
font_02_sfnt_off00012302.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 16792 bytes