Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c9abdd723aad6…

MALICIOUS

PDF

66.4 KB Created: 2021-09-14 14:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c06c6da9fdb144237fef1f880667c1ae SHA-1: 6fde0d010b13e50b9cf2ca452cb3c875d1f93b1d SHA-256: b98c9abdd723aad670d256c06f91178e1acb452da606edbe40c9b341a1310634
94 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a likely attempt to redirect users to malicious content. The PDF structure and the presence of external URIs suggest it's designed to exploit vulnerabilities or trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

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://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405af349564---95231144865.pdf In PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/18010583579.pdfIn PDF document text
    • http://linza-market.ru/upload/files/30631896544.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/bewutuzudalana.pdfIn PDF document text
    • http://homeopathyhk.com/files/73542896580.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/powotarajizanajotizipa.pdfIn PDF document text
    • https://bagstyle.uz/images/file/12833339295.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/57889462055.pdfIn PDF document text
    • https://rajaunited.com/contents/files/polexunaj.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/sotitisadowit.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210906080404_0hpft8.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/66093519188.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/91712317751.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/9123180969.pdfIn PDF document text
    • http://arsvet.ru/img/upload/nemusegelitabawitur.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/lanoxiwu.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/xepifawakiporir.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/14974147870.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/84128382934.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/falupizupebewelomi.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/jafivuwizifugiva.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/69024635733.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/63406977870.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/82082745420.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/netizexebut.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/40970831445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=weed+firm+money+hackPDF link annotation
    • 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_off0000bd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD26 10628 bytes
SHA-256: a8d847547f44dbd401677af3ae7401447359b95a54b736573e9857ce24ff83fe
font_01_sfnt_off0000d540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD540 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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