Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edfdafdd34f998f…

MALICIOUS

PDF

90.4 KB Created: 2021-07-31 21:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a1138ae7270712cda8e0aaaa8895e35c SHA-1: 621ad52c8089bf4947abc8560c3f9f744350233d SHA-256: 8edfdafdd34f998f159ca2396d60e6616ae7bfde714f929e8702307143dfce5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to direct users to malicious or compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ca339b80abe8930f48a9d5bf5a3ad534/84507570140.pdf In PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/d591b8c398d919fbac841015cc2cd63f/sapujudinalur.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/4949350206.pdfIn PDF document text
    • https://bestwaynepaltrek.com/ckfinder/userfiles/files/fumawumujujor.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3ecf0da00---43582055353.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/xitufijepexaderi.pdfIn PDF document text
    • https://fallsplat.se/file/pefusiberaduxofexazufar.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/95355155523.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/bivejarigivefubigilu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/fvhl1ab6i809ohjgl413qsa9g6/52856463065.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/3598391523.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f11c53353b---kixefuvurojovuvineja.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f138560a4f---rajefakip.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/793f41bb05e65ac15d7f520b5e999bf4/bipanifujifuburiwilizad.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607851ea69921---sowijobufa.pdfIn PDF document text
    • http://geose.ru/userfiles/file/80685741423.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/83428105001.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d87ae5335cf35be710aa711b5e928311/zogebimivisi.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16098843fcc8d4---64393156387.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610547d0ae0a4---vojujepepatuzuz.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb03b45555---kegelipinuliboj.pdfIn PDF document text
    • http://abwva.com/uploads/files/jexuxesijafem.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc6c49e8ed---sawixifuvirijupawugazekej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=clash+royale+private+server+ios+2020PDF 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_off0000fc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC49 17624 bytes
SHA-256: 35efb9b66853e3608c0ea1a14a8221a29adcfad3bd1b7095a0171fa8bc4fba05
font_01_sfnt_off00012a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A79 10696 bytes
SHA-256: 1b761b8716dacd8fcd3b6e58487e5079905bc324d44fc1e1640b23f91eef7ab7
font_02_sfnt_off0001433f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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