Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412624b221f74e2…

MALICIOUS

PDF

78.8 KB Created: 2021-11-06 23:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 88a3aa5fbc962853fb4c711a1aa37c87 SHA-1: 33a775c9e7360d62e9175c0047452fb4dfb085bd SHA-256: 9412624b221f74e2251d985c5b3d2871b8b8edb1681061fcb56e24e08a80fe15
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous other PDF files hosted on potentially disposable domains. The presence of many external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a campaign to distribute malicious content or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smelawservice.com/file_media/file_image/file/68355061208.pdf In PDF document text
    • https://icon-studios.com/userfiles/file/27021846418.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/25283056581.pdfIn PDF document text
    • https://datvinhphuc.store/images/file/rakopepepegab.pdfIn PDF document text
    • http://hun777.hu/_user/file/13013745801.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/74656092669.pdfIn PDF document text
    • https://firstview.christoff-design.com/files/5373460836.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/gegexinisajire.pdfIn PDF document text
    • http://vhktn.at/images/content/files/49998551837.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/56483587932.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1pbg6n9k05el36usv3c11eton5/sojikunaditoluzazon.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/41115767000.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/16987904305.pdfIn PDF document text
    • http://candientushinko.com/images/file/zegunojowixe.pdfIn PDF document text
    • https://dacola.com/upload/files/pumej.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/webofanavedidomarazova.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/70119936375.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pupowilepojuvi.pdfIn PDF document text
    • http://annabarons.lv/files/files/42744254246.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/97878652676.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/fadapez.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/76577127922.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/45304636121.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210909035622560400ebk9o8.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/5bhJmFgkeCE/uplcv?utm_term=inflamed+bile+ductPDF 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_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 10440 bytes
SHA-256: 2f64362453def5170e29b56b1ca4c46bb6b7121076c0f2dc6bf478d8f42031d9
font_01_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 18032 bytes
SHA-256: fe579c2edb0d72d59fb02c399b223f58779937756871101982b361b73afe3dee
font_02_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef