Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c8b419e904ee8b…

MALICIOUS

PDF

75.4 KB Created: 2021-09-17 23:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 56504a307bf38954e2f62c159a5299b0 SHA-1: be1497f33cd3cbeec0c8f84d23ac16952668f5d1 SHA-256: d7c8b419e904ee8b15444257a1e6d6db8bb42ba41b34ff5b2625f271b7a5d3cc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification further indicate malicious intent. While no scripts were explicitly extracted, the presence of many external links suggests the PDF is designed to redirect users to potentially malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5732

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://garglob.ru/uplcv?utm_term=how+to+change+the+version+of+android PDF link annotation
    • http://corkpotters.com/images/53810026352.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/58135022396.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mijibu.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/fimapifajiwumebube.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/5206619803.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/wonunubuzaso.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/13560848329.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/mokizorawenorepak.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/1558094729.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/11bfd0baed38c5b2419a0eff238878bf/15509837507.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/18921650563.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/pefujapaxesad.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/moragatokamozodabigolumem.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/49405009231.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210914081431.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/xovege.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/banitabite.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/81580240988.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/kasofu.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/63267951779.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c68e929075---66038228490.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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 17664 bytes
SHA-256: 64265208f57085444e339c4b93141a4962230d797e44f561187b0f6a9eda2d22