Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4d0746b60ffa96…

MALICIOUS

PDF

88.7 KB Created: 2021-08-07 06:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 09a5dfd7b2d7d3761e4d231a89494dd7 SHA-1: 865b05bd7389de5d4fc14818175f6665c3af6439 SHA-256: 6c4d0746b60ffa9695b8131695a3fe6c41f7fc7ca91c698510031fc80509c738
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were extracted, the nature of the links and the overall detection suggest it's designed to exploit users through deceptive content or by hosting further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/508cbb02168b849770471e7d34737ab0/zifapewizisinunoz.pdf In PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9cdfb0c8c---89814034754.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/57872351842.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a8854d489---11075648836.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/2bd8oc0bh7um0gn6j75irha5o6/jomidigepabifik.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607619895f953---winawiduv.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/948add607f2c04c241791542523a2ffe/pedukedeked.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/topijawamubobuzorewet.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6912da8a96---jijimovukolabibus.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/6hfoelf8rfvmig1oo84ttud5ga/wilanutepetariwow.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/dejelavoxi.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/sodawatixubiguxubijab.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2qf9m467l033n62fji3ph6sal1/tegewafenogudozapita.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8b6038a56---sumotepokolomag.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094399506dd7---mozodutobetafuvo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/7ec43f4c8feb5369cd2ab296f9039267/12806584035.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/botukaterol.pdfIn PDF document text
    • https://lordoptika.hu/files/files/vulenovud.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/fe3091afe3ece394dc10bb6077c19350/39395954555.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/45062146684.pdfIn PDF document text
    • https://deepex.hu/hirek/files/34887197373.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/ff5b03f08c13fd614fcc45a3939ddf19/70542789091.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed20b530fa---pusasavijusenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+mood+of+the+poem+dream+deferredPDF 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_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 17084 bytes
SHA-256: ed7a97d0c131898869bf49e577e520d357c31a0fdbc709cdfe5941c70fbf1089
font_01_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 10604 bytes
SHA-256: 4bf9961b0b6147ef47fda6517b8a9b326bb3002813f0aa6a14aadfa14f8ac060
font_02_sfnt_off00013bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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