Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebdba0c94fa205…

MALICIOUS

PDF

101.4 KB Created: 2021-09-19 07:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ebbbd2bcbbdf249d25af262ff13487bf SHA-1: 2f0ae775074d48a6cc28b1cb6006a37e2b83e3a9 SHA-256: 85ebdba0c94fa205ee3629b4a78bc3ab1fde7e739ec8deb1a48c8db678cfdc3a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ML and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm structure, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the presence of external URIs and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://dhesient.com/media/48332089171.pdf In PDF document text
    • http://acelybio.com/upload/files/piritazesigetafoxuwim.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/vowumarufafibuxebofom.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/28446279072.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/bevuvidotimabiwabore.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/mapasafekuser.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/56398837291.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/xibaribivekew.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/tafagovitivajobitajiwi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161412b89c3bd5---zasimepupuza.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/gonanatuwitir.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/navimexizuxilibigujuzera.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/pesamajidu.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/vopizupot.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135e7638b1fa---rozikojetowufepo.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/66416167897.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/66719444372.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/8138919156.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/22854407404.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/13206836647.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/fagowakemanamugipale.pdfIn PDF document text
    • http://zuche0551.com/upload/file/wowezuzijutasibezomur.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/bugawaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=nexus+6p+android+10PDF 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_off00012230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12230 10760 bytes
SHA-256: 846f4ff8e9bbdd95a668e0fa754721ec6a062fb0df14b806f7fac68e38183c2f
font_01_sfnt_off00013b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001532d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532D 20088 bytes
SHA-256: 84b5118ca078c2fafc633f1758ccfd20981d7cbef0874d833db36e821aa61f7b

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