Malicious PDF — malware analysis report

Static analysis result for SHA-256 526cb754f4205401…

MALICIOUS

PDF

91.2 KB Created: 2021-07-18 02:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2e2cda23f0155e2dbde9545436928118 SHA-1: 4bda2b51de7317d7e2c866a55362a2d2a05697ab SHA-256: 526cb754f4205401c2f67d78a77a9ffd9f110eb1a3c7bfc2a20e17498a33cd3e
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 or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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://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://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_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
font_02_sfnt_off00014782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14782 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.