Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8079f05a90b9b1…

MALICIOUS

PDF

64.0 KB Created: 2021-09-24 12:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ce5b156615c9d00b092429bec222b85 SHA-1: 8330a3603877fa18a21a95ccf9bb338d55eaf7ce SHA-256: 9d8079f05a90b9b1db9ea474b132c821b799a08c563c60f89c734eec218bb174
124 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification confirm its malicious nature, likely serving as a lure for phishing or to download further malicious content. The presence of multiple unknown-reputation URLs suggests a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://garglob.ru/uplcv?utm_term=the+witch%27s+journal+selene+silverwind+pdf PDF link annotation
    • http://tongchangkj.com/uploadfile/file///2021091419104520.pdfIn PDF document text
    • http://enricobarraco.com/files/wutoxizavavimaliwadomuvor.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/75363550476.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210908223136.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/48513684889.pdfIn PDF document text
    • https://novsport.com/content/File/petaroxokofafejejogave.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/60477425443.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/17747888870.pdfIn PDF document text
    • http://deauville.ru/files/file/94516996797.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/71299341476.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/161338907ed4ee---suzosutufugab.pdfIn PDF document text
    • https://renewone.de/files/sugoramasejivefepu.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/gijovitaled.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/bonivuvad.pdfIn PDF document text
    • https://naves.cz/res/file/gunutevomedebemenu.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/47820069890.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/37322919839.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-13/20210913131544442228.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/tetofiz.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/m75cp5mqs4k4vamprmk4aonr02/85695386063.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/93525781555.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/tifitobofemusajuvur.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/bewemaweselifowudim.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99A 17144 bytes
SHA-256: 972227bedae79707a60b2b012a7dfa25fa38f0176fb6cd7ed8816c788e1ca4ea
font_01_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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