Malicious PDF — malware analysis report

Static analysis result for SHA-256 d011dde77b1c93cc…

MALICIOUS

PDF

75.7 KB Created: 2021-07-02 05:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: acba4d8721d0c9054d6aefb0d947b88c SHA-1: ddf0f586c1f88c9fa41f48dbd5035bb7fc1f8966 SHA-256: d011dde77b1c93cc64a8f1fb91b008414fb1ea6e37e59f03b2e846c1d822a7a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://theonejsc.com/userfiles/file/88751318495.pdf In PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd25f2dbd8c---nonabapopizagebinid.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/senufapinajababazodowizit.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/satufezawa.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/28200871268.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pms5e6td65eor32617d78tiil0/gumuresetitukozatog.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/dijegapisezamasivikozofuz.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/laxedonokaguzetakopux.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9ouj5oubigh2gonbfc0ql3vcls/tugekexuvilukinurizijuxu.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ebc8e20ca---49893724938.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/nosofob.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16070a8e9603c4---53994298085.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/gupadabozevakopuk.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/foforemupusotaki.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac336d446---17983773585.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96c9f9df55---xamedujumetenovudamib.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b6b0329bd---67261651610.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/99501154323.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609475aa99d08---toxozusonesumojebegusota.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/jixexukexi.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fc85a0145---58729322379.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607def9e7cd07---56951181080.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/14514608407.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f220de7b3b99be9c1b3d27ef7fae5f73/serovuxisurix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=health+care+exemption+form+8965PDF 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_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 16368 bytes
SHA-256: 7aacf741068dce45524ad69694c63020f9b1799e552934d076a2ea864b2c099d
font_01_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 11348 bytes
SHA-256: 1bc70c00d5a1da48a1fb8fdf41b2f80bb84646194ae71c8a6f39ec6eee6a8eee
font_02_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1