Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9d992fc8859a83…

MALICIOUS

PDF

89.9 KB Created: 2021-07-08 06:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0b3b02dcf135136e2a3ff4fc18aa2530 SHA-1: 82ad85fb3d047b4df3c36921e0bcc8ec062bb88c SHA-256: dd9d992fc8859a83d74f52fb026a2fb88426113fe44511e39969ad0e420fffdb
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URLs are consistent with a lure to download malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609f969690036---85034696207.pdf In PDF document text
    • https://ikima.fr/uploads/file/93075042407.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/34604017912.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d2bcbdcde06---dewifepemoju.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/gixoni.pdfIn PDF document text
    • http://leton.pl/userfiles/file/ladirumap.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/36e1fd5ee70122c6606f8eacc6a9b118/17661864922.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/90181063997.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/13833137091.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b72424c81---38987459965.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/4544811e635165887108cc7699f8ba04/nifun.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0b1de10842bfa5675f571d03edb8ba98/69080958919.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021042919162948.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c166f2d956e---junedobekilivis.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a0ceb5593---getenosamusod.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fa242883---3864091983.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c515a0ea0---fefiguguzewezanomob.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/59295969289.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/35d45cd73371c68d56cea7a1769b7d33/9558469623.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/be6401c4c2108eed6703385dfba8bdeb/fisuzozowubig.pdfIn PDF document text
    • http://lucann.com/Upload/file/23176929982.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/75ebb31a0df3298e5599fc548278ad2a/46486112007.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/mupolitiveliw.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081be0f1ea39---xizogowifodoritago.pdfIn PDF document text
    • https://tavio.ru/files/file/kigor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=distributed+operating+systems+tanenbaum+pdf+free+downloadPDF 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_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 17152 bytes
SHA-256: 623af5fef2e7417f2df9ade8959e1e61d5825416d5e7699ab16045ce1b3b7dee
font_02_sfnt_off00013f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F73 11280 bytes
SHA-256: 6de3ed9820988ac3a071e1b1cef86aa4ff6fcc68e1c31f9da60a2742b117dfab

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