Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0dc8d20cf9eaad…

MALICIOUS

PDF

87.1 KB Created: 2021-07-31 03:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b0c3de297fb8503de3acfc6c8077fe7 SHA-1: 1adac89b22bf30c8b48fa290999f8dab7d45b5ac SHA-256: 0f0dc8d20cf9eaad2876829fab98a97a9c887f10b7bcf64714bc9cb123a5d5db
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to various URLs, some of which are hosted on compromised CMS platforms. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the document may also be used to trick users into providing passwords for archives, likely to bypass security scanning and deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ketchas.ru/uplcv?utm_term=printable+simple+paper+cutting+templates PDF link annotation
    • https://fcr-fomentoconsumoerenda.com/uploads/files/26697989494.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/83570610883.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/xapukifekovabaxiderabem.pdfIn PDF document text
    • https://facades-metal.ch/ckfinder/userfiles/files/gixewukoxex.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/94809282988.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/45f82f7e764923f4d91cd38316461e84/12338242934.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/6473359131.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e60ca3955---jekewuropelurotixudagimuw.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160952a6b2b9f3---87482337005.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d355f175b2---64387954564.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074273a13907---12894450069.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dff529397d---85205330219.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c1d6b3e748ff88f154ebbd4c26eecf9d/pimedogesepexupoxeke.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/furaketabazik.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/riwewevovosiluxoxaviseba.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/ganiwexosekopovuwisibazi.pdfIn PDF document text
    • https://agenziadiviaggiocagliari.it/file/92709185774.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/midub.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f2f0e5612176770c45ceec66bf5ba130/59061671435.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/ruzofaliduxul.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d32ba768a4---99130257185.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_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 17040 bytes
SHA-256: 861c9742ecbf42eccf9f0620a6d79005866e04d5fbb71060be8b3ee61f92af28
font_01_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 10836 bytes
SHA-256: bc1efbe1736f515e405105e6f3adf8db0ea75bedc7d4e47a6bf31a2740499643

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