Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12c9b4eacd07c8d…

MALICIOUS

PDF

83.1 KB Created: 2021-08-13 11:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a2e60aa37a58f38d21134ac50f759205 SHA-1: 7754c7b32c530c6fe303c4a4ad847e978849a7c5 SHA-256: e12c9b4eacd07c8da9e517951ee38aee20d016c74e753835edecd230177295a7
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that point to a variety of websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farm heuristics and external URI firings confirms the primary function of this document is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=ap+classroom+biology+unit+2+frq+answers PDF link annotation
    • http://poledance-chrudim.cz/files/file/53081906675.pdfIn PDF document text
    • http://indecomavo.pl/inc/xuluporuxumoxanedazakol.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dad033a63---96861158850.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/mepiwokuxejajo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b9b6730bcf06cbe0f661b4e20f64d7ff/tanuwaligiwuvivasezoxul.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74671d89e9---wadakalaximaxe.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/50882942408.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/kesekigulapujijatisol.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/vujewitukifumok.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/sevesafusoru.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdf4b3168f---88349689344.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29dc39ab4---vobamadenalobedixazapesux.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/58965494327.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fukebokukozeja.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/1481554282.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/47815070306.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce60fd89de---faxabemerixutemudoguv.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ac345441d34f7bd5948ee63543a5ec17/96351123150.pdfIn PDF document text
    • http://builderall.info/userfiles/file/wigotapipupezamu.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/80304681684.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/34292024431.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/wimixoga.pdfIn PDF document text
    • https://apstudent.collegeboard.org/apcouIn 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_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 17020 bytes
SHA-256: 7d5d7039ed00cb722b3e55245a77f1e68eafed48f0e950cfd8abc08e3c28b010
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 11508 bytes
SHA-256: 9e4afa3e75dfaeeeecd040994262d6ef0c54353e1d56c8866eaf6a37af96accc
font_02_sfnt_off000126dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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