Malicious PDF — malware analysis report

Static analysis result for SHA-256 499aa9820f89f629…

MALICIOUS

PDF

77.6 KB Created: 2021-09-09 12:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d375daf63cce4abda0c8fa60f2cd0fa5 SHA-1: 1e43a0e4f11b42cee0ad375544f7caf889f690d7 SHA-256: 499aa9820f89f62984cf1c162122e325438554206a182b8045ce0b14f8b6f299
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. ClamAV detection and ML classification indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5520

Heuristics 4

  • 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
  • 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://ildungrice.com/fileupload/fckeditor/file/14721505098.pdf In PDF document text
    • http://colantuono.it/userfiles/files/jawetupo.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/mikitoraletenu.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/fomadelimusi.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd303605c---60748271472.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/vagilijijevisisarutezajo.pdfIn PDF document text
    • http://sooclose.eu/upload/File/muzadefevov.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/37336189836.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/88580775615.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/58690250133.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/51512067233.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/gisifofow.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/rapefapinibunuzijigasu.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/davenasewugomujalibez.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/xikekugujow.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/wobifexiduxomupek.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/zifafadogegixadovi.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/bapivebomuselowa.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/dedofideverovulujiseros.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/97ce109bc1da9e7d6cdc94664d0f7a7a.pdfIn PDF document text
    • https://tsolisp.com/files/file/27379459924.pdfIn PDF document text
    • http://c-six.it/userfiles/files/2348284937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+camera+shutter+soundPDF link annotation
    • 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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 10672 bytes
SHA-256: ed2d802b788459862e241af539777ab6dda3e04e90c1ba8126481db08e55592f
font_01_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 17824 bytes
SHA-256: 5dd1f20be6235da32ba5314c0286bb2623fe56f5d9b680a61913b4170efc88aa

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