Malicious PDF — malware analysis report

Static analysis result for SHA-256 2064bd4c12bc5e46…

MALICIOUS

PDF

101.0 KB Created: 2021-07-04 17:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7a2df3501f49fd5adbcb09065cf49ab2 SHA-1: 302f44378965dc5060eac1b1f1753746c2520e27 SHA-256: 2064bd4c12bc5e46e7f3d571d32702eb5587373c9de67a5690675c557f9ec5f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings clearly point to a malicious link-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ea542ce50---zajanebo.pdf In PDF document text
    • http://svazekobciorlice.cz/userfiles/file/67358433227.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5u9q0l96mttms0se20ijke3mm4/paxaxepod.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c1646a88---lemowazoje.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/dajesavujirakob.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/46085621352.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210628_053446.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/pmbga9eoq5v2cs5jp14akl56c6/fafujutodatevinowe.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e166946fded---falirazeb.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c196bf099---27678325819.pdfIn PDF document text
    • http://podushka.by/files/files/xabowelovexusoba.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7k7gnr5ggh8pb6j47q4d2pv2h7/71908326777.pdfIn PDF document text
    • https://noddy.nu/images/file/vedize.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/b0b413042e793d8a522b123b607851fa/51571382496.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/badikunogijoxazejab.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/luql1hqa6d1hi9l3kl8g3vtph4/relatexesutuzile.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608212cc1090b---purogo.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/1mmg5iotdjeld1i5o7tvlq6mb5/munerozutetamitowa.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/pofanarezilow.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/91348320208.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ea2ab0594d8711db31b490023a408496/35309371041.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3645590a2f1a5b6d1035badc94794161/fekavajafi.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/94224468856.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/57612224c3d8ea98f8d65a7eb7d32fd5/82261151412.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609843894862b---dawiluzitewasapipa.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ipsm7ugd74crtsej47b0ukcod0/36856179362.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f9294725---zasana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=food+and+beverage+questions+and+answers+pdfPDF 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_off000124a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A1 17836 bytes
SHA-256: fa0d3b765d68fd38073c9dcef1664f6462971e4180f12841155b72dc7ff95638
font_01_sfnt_off00015314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15314 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B2B 11144 bytes
SHA-256: 9c3d45ab9670a19112b2ba4abd45d82fd17bce3c342d3852bb5c85e979c29b60