Malicious PDF — malware analysis report

Static analysis result for SHA-256 293f941b59a32012…

MALICIOUS

PDF

95.7 KB Created: 2021-09-04 05:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f18337f24551a5a16bd5adda4d87c26f SHA-1: 79ddd02078664b179a6695968242f00a27420abd SHA-256: 293f941b59a32012d5841c5f428fb70bccd96386e45d5356494035d8dd2520e6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting an attempt to distribute malicious content or phish users across multiple sites. No scripts were extracted, but the presence of external URIs and the link farm heuristic strongly suggest an attack pattern involving redirection to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5288

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=sensation+and+perception+worksheet PDF link annotation
    • http://thesprotia.gr/uploads/file/31424680896.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/61528073140.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/todanerobe.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/xelefetotalukamemuz.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/e9bd39daa5888c01aa700e7807944058/pazaxarux.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/wofokosulikoxoku.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/parixejodozupugodofunive.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/28410160164.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/433479097.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/3898490810.pdfIn PDF document text
    • http://lobi.md/userfiles/file/81671556812.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/75221958499.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/8092861647.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/12909882281.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/42224443235.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/vesizawevul.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/wuzavisukuzekabob.pdfIn PDF document text
    • https://ebdaatcoop.com/userfiles/files/53495604442.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9d333805---2044964900.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210821101032.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_off00014522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D39 10816 bytes
SHA-256: eb36b2eff37ddb6c5a459974a556277ff33ead04adf15772032003d0d11eab72

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