Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89f3149fef28c67…

MALICIOUS

PDF

94.2 KB Created: 2021-07-02 11:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 29018386f634b63e47a0d74a89b2949a SHA-1: c5c767c3d4cd083617ec94f5b28be5bb626ac489 SHA-256: d89f3149fef28c677ef28f950290273c3bfca60396a8253fb91ccacc62100bce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs that point to various websites, including those hosted on compromised WordPress installations and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=a+square+and+equilateral+triangle+have+equal+perimeter PDF link annotation
    • http://vds-construct.pl/userfiles/file/54759307942.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5576a2669c0f96e9a10b82ae82b78077/19146936609.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/70881401456.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/tifozoti.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/l984047fvao0bocai6s4fu065i/26499229834.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/97662946973.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/idm9tg7uvd58ecv9t9mrmhi2o7/bomudigikufudubokuse.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/zuvedatijuvafirifor.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/31962729780.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/zaxexux.pdfIn PDF document text
    • https://stvorki.ru/files/file/kuzetojuzajifajer.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/97650029110.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607813244286f---vogefonosajikubopegeko.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/nukumes.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1a878cb3a---88195724019.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984098985f0---51055702092.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2ss6bipm5kd3shppg9uq1ssc71/volunajuzulixim.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0cfe012ed---38645590832.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa50649412c---tekegavaxadovixovim.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/46398984404.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/f774c823b4d40d6f0d25a24e44ccb4d8/97303915028.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf1d475726---sidixipupexaremo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001208a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 11012 bytes
SHA-256: 0e751a2e92907073afc3c278e2f78f4a9f4e6f9128d3ba2922ed44346dcfa047
font_02_sfnt_off00013966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13966 19288 bytes
SHA-256: 1accd58811400f63eb286a6a54d4d79a7ca8b1fe74dda3f8ccbd55c72a0c463a

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