Malicious PDF — malware analysis report

Static analysis result for SHA-256 933643599629554f…

MALICIOUS

PDF

93.3 KB Created: 2021-09-05 21:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a1e21057cdfb024ea025090c6ca27d7 SHA-1: a0ccba69866799bf7a2aed7c2f173076a090de23 SHA-256: 933643599629554fb7b5b413e732b4307c4f66fa83cdd7bba932dcfb3513dc42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://diarch.in/WYSIWYGImage/file/baravetumigunaromilug.pdf In PDF document text
    • http://nickels.design/ckfinder/userfiles/files/mituv.pdfIn PDF document text
    • http://alkanboya.com/files/file///wobezaxasatejegakomi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b171dec48cc.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073dc778d82b---45415095172.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa858419037---68424920239.pdfIn PDF document text
    • http://usdcp.jp/user_data/userfiles/files/topidimoxepem.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/varqbpt6kj5rufm89cchp09uop/78857484610.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0061865a9d---2432671884.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b803c7edd---vezibaz.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/58645978811.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074674d24a94---nalobefuvasigixe.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/74979721445.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/47012747407.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/4vfhc7nco8l7ke69na4iguku3n/34142567931.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/menotalumawafutafesepo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3890ce143---71513676025.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160940f4ceb3c5---rasarolikobeb.pdfIn PDF document text
    • http://minerva-collection.net/files/files/70346613491.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/ginufogojebenalunuwe.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/15132592537.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/23405725498.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/zarovozatogola.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/72617671905.pdfIn PDF document text
    • http://clerus.hu/files/file/74054776635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=cancer+de+mama+pdf+unamPDF link annotation
    • 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_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 10388 bytes
SHA-256: f57e3345a87c6e1f6ea86dfe6acfff4e6ee67965ca07a7c9db8d2185894b7664
font_01_sfnt_off00011f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13733 18948 bytes
SHA-256: 2a1a9cb5c519e7331ea8a8b803f15c86661a60e10090066497213c1459d03ef0

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