Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd642f6d9fa1812…

MALICIOUS

PDF

81.8 KB Created: 2021-07-18 02:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ae9c1a9dda05f15aeebe4764705534da SHA-1: 363ad4b584913ecbd56c5d26960284ff31717a57 SHA-256: dcd642f6d9fa181208626e602e4ec15ee82d36ac952392fd7a9b1e826e90c917
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external URIs and links to disposable hosting, indicating it functions as a link farm. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to direct users to phishing sites or download further malware. The use of compromised WordPress uploads and SEO-disposable link farm techniques suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4663

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/62f39b7d18c581a48f357d7d35f1200e/71319222310.pdf In PDF document text
    • https://trexanh.net/upload/files/mogapexarunofavosaxofu.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/kuxokikasuxuwotokonefubod.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/jovaxigemiso.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609434f251ef0---91112316054.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6b53d4275c2b5049afd681f388bba794/minapoluvejitetizo.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/geripupojisotadowo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/10004b8fb5ff2fe9b59b220c356529f9/1221812843.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae37c48f249---xifebitevepeluva.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccc178c61f---duvuwegaviz.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/1d8f787a6358bc9348441a24b9d8fe7c/67082257532.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/62295803020.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/slvomttq3dmcani6avmsuhtpsk/fegilibide.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/sakidekowesugezaja.pdfIn PDF document text
    • https://topupdana.com/contents//files/sojumotuxodewumifam.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/kivepapugumafuzunopogekek.pdfIn PDF document text
    • http://hydrem.ru/images/file/47184559634.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/15803625691.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/2eb6f177a83d0f7e3c952e98edbcf693/mewubujorurerutusuf.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/87940916319.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/97524580557.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/redoxuzajagizogaroji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=domain+and+range+graph+answersPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1d74c8572---39569992921.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB9 17884 bytes
SHA-256: 0a59033d860786377891f029d7445e9de21fe424431f9a454326de67c251f5f8
font_01_sfnt_off00012f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F15 10784 bytes
SHA-256: 70a50672be81162e3891019444812a582e9339b99879cefce3d08ea0dc1025bc