Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f894098e5a34054…

MALICIOUS

PDF

88.7 KB Created: 2021-09-12 22:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: f4186d80bed9269083c4df6e9df5fa76 SHA-1: bcba78c3c834d1c995d9bb94e9d35bf798470fbd SHA-256: 6f894098e5a340546784e4df639ae92289bc818a4301240c2b9f599566ffa51c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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
  • 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://garnet-medical.com/userfiles/files/mixezavunajutixapedakino.pdf In PDF document text
    • http://udokutscher.de/gfx/userfiles/files/73447442282.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/vedujepamaludedoviram.pdfIn PDF document text
    • http://gptools.net/userfiles/file/xusifivokulolo.pdfIn PDF document text
    • http://portableandcool.com/files/files/53297149333.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/leweleralan.pdfIn PDF document text
    • http://lovesenergy.nl/file/22259095854.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/3355904966.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/firamunozaxesivumobenop.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/79426713646.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/93293893562.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/tanemunekewuxijanudesipi.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///nufaremejogovenugi.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/59476363604.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/kibobiwul.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/jokanigugeguvuvizixa.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/38877768740.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/92647778378.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/welabawuwun.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92474226752.pdfIn PDF document text
    • http://sudeoksa.net/userfiles/file/20210911070734.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/82422803218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=watch+movies+online+123PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 17596 bytes
SHA-256: eece73ea7dbfd88fb8e9d51d4cb600e259cc6ab4eb9de799dc1c0d7017909dbd
font_01_sfnt_off00012461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C78 10800 bytes
SHA-256: 76d2ebbac8092f9c651872b5c2dbd197bf5cd23302d34806a25d35a659b34193

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