Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8ec2c65e6fab29…

MALICIOUS

PDF

68.1 KB Created: 2021-09-13 16:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 54f014b8e4f61fe97f8fa219789117c9 SHA-1: 36ebbabe69d5215ee847a411665278cf7304971d SHA-256: 7c8ec2c65e6fab29f12a3ae70002f4a6a1f18298cdfb0bcf9e4d71137e947131
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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://terracetemayonetim.com/upload/ckfinder/files/66328041856.pdf In PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/33522647756.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1631069029.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/33499961124.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/bununo.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/roluxazi.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/9482522920.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/94014610622.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/7810916646.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/mudavudekoworuzor.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210909_223627.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/81403526982.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/65499723931.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/48870551962.pdfIn PDF document text
    • https://simorgh.it/uploads/file/99279388220.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/18951812762.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/revafozuxuvakenal.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/pagixozuvuvef.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210906220714.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a9d5170c1---fexurewinalixetepebumaf.pdfIn PDF document text
    • http://nemochem.cn/upload/files/55729152083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tinyzone+movies+appPDF link annotation
    • 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_off0000bb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB71 10372 bytes
SHA-256: 1888aba387cb445d510c71efdbf0bcad30e8a012f462b766950b5414b960bbaf
font_01_sfnt_off0000d2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 16848 bytes
SHA-256: 24d86260aded78d0800716f22ddd3fb7d8f8db76e4049cdf84fecebc0ea70095