Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca3ba10ce753712…

MALICIOUS

PDF

119.4 KB Created: 2021-07-03 06:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e26e24f75ebe706447fc8c635fe3dd07 SHA-1: b1c783c332472c984a1d32df88a8d573deb0a868 SHA-256: cca3ba10ce753712f035de2b11a648fa35097d0f03ddd68dea6d6cf4b3809b7d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://nomylo.ru/uplcv?utm_term=multinational+and+international PDF link annotation
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/859f38b6f9e9889db3258a7694ccd02a/fevesigivi.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c559a78e4890efe1346bda6c722e5745/12504094717.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089422a35670---fekebanefibu.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e208ed13c9---13097965728.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/foxakik.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/penanades.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///bagezine.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4470a301---dakijakizevepafafadasire.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b0203a078---31448691637.pdfIn PDF document text
    • http://adria-ex.com/32390230203.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/8f2da51a775198bd77fbf2c67070c80e/rubabafojisegirave.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/bivuta.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d89ca0c62f255866f231af2774caf118/90325812748.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/91002331540.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/29831494806.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/51231491427.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/41162298612.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/rodebitaxoxedidenowufol.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/nabezefan.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/rolujawirifede.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/51783575521.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/uotjp89s8oh93d474iu2cr23g6/34496596832.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/miavfre977km30hprmr14g34m1/wuzorunu.pdfIn PDF document text
    • https://aokman-drive.com/d/files/ginonarotapaguvinujafafer.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/lk4e30bc55q2a3j6ev9hjpqg2l/85163440020.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_off00017304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B1B 10164 bytes
SHA-256: f126ebc3d229f82cae764c6540792471bd23613933dcdc8d5cff5e5c672b6795
font_02_sfnt_off0001a1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1E6 17608 bytes
SHA-256: 0e1f341034ead3e49caf2e630f3f0ad6ada9f21cd0534400c8e4a9827cfc913e