Malicious PDF — malware analysis report

Static analysis result for SHA-256 52280cf0f0c4b1c0…

MALICIOUS

PDF

92.9 KB Created: 2021-06-30 07:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 852ae24b725249cb6c4a08c3a59a915b SHA-1: 0c96ac0e09865b51135169f97df233ffd2cd2ee3 SHA-256: 52280cf0f0c4b1c0bb96a530f3681919e18c7e4ce6bd5f00131067c19c5e0db1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7886

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://drafthe.ru/uplcv?utm_term=getting+a+broken+tooth+pulled PDF link annotation
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/zewenojamorobuxisub.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/o501ihvtmd3okktm5998hts3a8/97198829538.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/89150785115.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/9327597212.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/bapivija.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/8i0bidlb5ifr5ljncg5q8uea2h/87496827422.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad68bea17c4---59393537426.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/f7c9ao0ro25d5fuptabqc3hos7/48888491810.pdfIn PDF document text
    • https://mytopics.it/uploads/file/80696162716.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/jomomo.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/vbrb8k648ikkvfu548n5vc6qpu/57949836377.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/9344ec54dda55d8b60a30aadc5c99ee8/bemerejareb.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/ralutovifopawimep.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c813cbfbe---52197335845.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/94529441409e39dcbc13ac17c9f5a67f/82089111351.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7b51f7f0db6d201cb5a6a1f3070b624a/87259661284.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/josakivogetopabowezob.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/rumoro.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf45e76b337---suzixivipalegavuv.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/44891045788.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_off00014b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5F 10876 bytes
SHA-256: 1ab22f89c51329882bc3d942fae83c68d0f295a8eb8d21f787e71702a292e188

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