Malicious PDF — malware analysis report

Static analysis result for SHA-256 9975464b0bfb6127…

MALICIOUS

PDF

70.3 KB Created: 2021-09-01 07:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec2a8cf72426b8b68d0a82f1e8598d58 SHA-1: 6c7edd4a7448bb801a72eb2b4f624195d2d0cd4e SHA-256: 9975464b0bfb612744ee67ac5c41db04db65a84dc036f311aaf3c246e8433953
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs hosted on compromised CMS upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to download further payloads or submit credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8021

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 http://normel.org/files/upload/file/49938635277.pdf In PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://duonglaohanoi.com/userfiles/file/52106234350.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/a4a8d5b6e208c0d6945e478a8e48ad22/13046389622.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/16086135035.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be8557167---bekefas.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/52380282047.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/51634747067.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/48178468251.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/05e737e269e9a557bf9fbf1acf4e1f61/65194167469.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2694dc5251e033a5d317598595f5cb1d/xinesodameju.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/17201643196.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2106190454187520019cm4v2t8wk78.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/86148803261.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/solekeligakipuxivo.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/21162825932.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c517528ba---wufofavited.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/kqtmmjlvqn7her8noejma7f4f3/13272970060.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/14737361449.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/28472779060.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/aede6a762dc04b963173ab79ddba38a5/dezubegamas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=baofeng+uv+5r+show+channel+namePDF link annotation
    • 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_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 17300 bytes
SHA-256: e34f13085a738440952867edc379f15c0bebc525241baea15033577bcf83a348

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