Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd211648906badf…

MALICIOUS

PDF

69.2 KB Created: 2021-09-22 14:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0f3a14e144826aa14d7045b792770e51 SHA-1: 2701d699941ab3daef833b090913cf9d9a562a97 SHA-256: 7cd211648906badf908bde28fd9167c202125e3ffee3d18426cb0f9f91e74b39
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload directories or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=best+simple+music+player+for+android PDF link annotation
    • http://datcat.vn/2018/file/43401230306.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc57f0640a---69497055442.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/24896895050.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/11531958913.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/vurixifimuwubewalofozo.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/vonomiwujunop.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/58022130502.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/44075795618.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139445ea1bbb---69323842623.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613348955f3c4---nabazeferunipejaj.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/59961513254.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/11001442763.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/44156951716.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/25238531398.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/92355442516.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210901_DF8F13393EE43894.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/76597993745.pdfIn PDF document text
    • https://sealskinz.ru/files/file/48601651062.pdfIn PDF document text
    • http://yjccnc.com/upload/files/80037591834.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614854854236a---vagemare.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/dokowofazomovasot.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/58398541504.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/37511706678.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc7b632149---1850511132.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92D 16976 bytes
SHA-256: 3e56766ef01db2f7aaed08123643e8f7f0d5f509191217c4428b49842be5f59b

Open this report in the interactive analyzer, or submit your own file for analysis.