Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b59cd73c3124a9…

MALICIOUS

PDF

72.3 KB Created: 2021-09-08 18:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 670960aabd000067e30daeb025565318 SHA-1: b8256bbbb26670982f7b3e3a97fcf968ca4b5b0f SHA-256: b6b59cd73c3124a9117af266db3a1438d74a55bf1aa144705881b6c430fb4a65
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised CMS uploads or disposable hosting, likely to lure users into phishing or malware downloads. The presence of multiple external URIs and link farms strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://md-servicios.com/userfiles/file/46611434906.pdf In PDF document text
    • http://jullien38.com/ressource/site-image/files/wotupotawisabebizagutus.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/21780455860.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/nawunovife.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ebc092c83f843e2a7e160716d31126d/53860953865.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/zulodunez.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/u51p3epjtrrn8q4ib6vmdp0jfn/43388111693.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613432e0499d8---rewakipigetazojafi.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631008337.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132787ed071a---xedukemanaponaronevosak.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/bulixexamokarare.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/71471181275.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/bavuvizedo.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/pimatebupifetaw.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/nizof.pdfIn PDF document text
    • http://tyextractor.com/d/files/7922592068.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/11769777433.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/rimewofi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd08bc4efb---gemav.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/tezovonilubafekamese.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/2fa561e31d07e3e5012221193d527ed3/xewanuj.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/92664437250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=piping+%26+instrumentation+diagram+symbols+pdfPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/84173468188.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_off0000be6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6A 16420 bytes
SHA-256: 500b9e899aaf8da2757254afb4197f8a57dc96f8d9eab8d15b445cf94a79ee51
font_01_sfnt_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 9596 bytes
SHA-256: 190166d98595f76aa144b7e82df57dda2c9fd26a7c044c541d3293b7d14e123c
font_02_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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