Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e2244b5f5ddf69…

MALICIOUS

PDF

78.1 KB Created: 2021-09-03 16:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4e8dca1a4ad93fe31f77e64677cb5d51 SHA-1: 124674f4f8b79a4d655efa57028fd3b28313843e SHA-256: 48e2244b5f5ddf69f958c37b941d4dd8858604f522eb57a3626617d7e80b9aee
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm and a browser installation lure. The embedded URLs likely lead to further malicious content or downloads, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the overall pattern points to social engineering to trick users into executing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://catamma.ru/uplcv?utm_term=novel+habibie+dan+ainun+pdf+free+download PDF link annotation
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/jigr2gjdqktr7077j7eq19hnb4/86787212331.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/62086882826.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53f9dc96e---povazo.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/kikepobizajudikunaba.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/54031120001.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081684cc46c0---kigodiligedo.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/tajulimunelesixo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7e4603fdc---1756499550.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/69592704423.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b86dce3c07884f5d641f79ee9e314fa3/nuseg.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/70623290855.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/94678527457.pdfIn PDF document text
    • http://aimic.com/userfiles/file/nefosozatulupotoz.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/oj9ahim51143kro9fp6pt2qmr5/34235928948.pdfIn PDF document text
    • https://esvigo.com/upload/files/73435603164.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fovaguza.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cd0d6a21e8---68318262615.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/33211883259.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021082207203432.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/92187429166.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/nuvabomakiguvufusoroted.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/2pcp5o60dvvee2cqisuaigchoi/78423320124.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbff8957fa6---36822249064.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_off0000cb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB80 10700 bytes
SHA-256: 74183c1955a903bcb647de22c63455982ed43bbad6caf8bdad8dbb4aab422420
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 17912 bytes
SHA-256: 31f7d73d719be42ca80263b067bbcd96ce02984654478d75add674ea619b7933
font_02_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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