Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6eef76caaaeb4a…

MALICIOUS

PDF

85.2 KB Created: 2021-09-06 16:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3c7a10f3f27391af8d26464282d90c00 SHA-1: 0fdd1f943960d680f8fdbba77572fb86e1a2070a SHA-256: cc6eef76caaaeb4a9ed34e908503f7d9520de7befc4c03a72e6e25aa11f648da
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=afiador+de+facas+manual+tramontina PDF link annotation
    • https://get-insurance.in/ckfinder/userfiles/files/85828665820.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/86477737877.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126b66cda92b---zufituregamozo.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d3f4225f---najexisuritefatujojuxi.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728a3e4d20f---gepiwepawu.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/64213819760.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/runevoxosewizabibobile.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/lqvpbr6qq8dvchhbt56vq7dv5q/42450571878.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/bifotij.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a2639b13851b85a2b9f1892eab874567/34464318253.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/50745676479.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-3/20210903224825105097.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2220ada99---javavato.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/kitewuja.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/sogetibosasimaboxape.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/50774841250.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/99502895688.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/b573dff9c70871c6914f78980034e9c3/lunetilimemadaripu.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf944c5654---4851469906.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ceac446dfa1482146dc0a60fdad4b4fe/98107308507.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4129db816ae452aa303c260b8ef761ff/19759391907.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/musexibasofi.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/23244766365.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_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 19172 bytes
SHA-256: a17fc215052b53c7a51cff7df714a18409ede02b4c53ee3f3d36867a1dda412c
font_01_sfnt_off000114a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A8 10716 bytes
SHA-256: 7766c8e44d01c79c66b3fa39b9e3e058b0fd342492dd22cd25330a7fd772888f
font_02_sfnt_off00012d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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