Malicious PDF — malware analysis report

Static analysis result for SHA-256 991ec54afc1fb982…

MALICIOUS

PDF

79.0 KB Created: 2021-10-09 00:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f24ce10aa5afc040c3a68a312e930f14 SHA-1: e3f8312262cc26acfa51d3a9d95ecc812515a0f7 SHA-256: 991ec54afc1fb982a8221e7a7ac617445c6d81cfcd43d5ac1078d7c63617ce2d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a critical heuristic. It contains a large number of embedded URLs, many of which are linked to link farms and disposable hosting, suggesting a phishing or malware distribution attempt. The PDF's structure and numerous external links indicate it's designed to redirect users to potentially harmful content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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 https://huntic.ru/uplcv?utm_term=download+apk+files+on+ios PDF link annotation
    • http://korea-seals.com/ckfinder/userfiles/files/67509709246.pdfIn PDF document text
    • https://vizcsap.hu/files/file/lipitawibo.pdfIn PDF document text
    • http://licausi.it/userfiles/files/28182917773.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/xijovafigixekumene.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/24978010697.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/ginel.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/pulefasupufivarewezipuwe.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615063b50aacb---nojefuvoxivikatuna.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/86517071593.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/lamotomavunudozipetozaf.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a3b89739055bf4e042c38a6f7e1e985b/16868638568.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/zugero.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/fenoletivixadogoxipev.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54400739094.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/70891927193.pdfIn PDF document text
    • https://chineseclothingonline.com/File/zilesovexera.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/xaman.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109261013561617.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/612fe79eb21e6.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/84385442826.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/60200875426.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/10775578230.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/52299436743.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_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 18476 bytes
SHA-256: e01a21a6dca5601731082ab490de7a3b3376bbc3965f86150754a8adbd19cd30
font_01_sfnt_off00011c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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