Malicious PDF — malware analysis report

Static analysis result for SHA-256 f718c3d1570a08ba…

MALICIOUS

PDF

148.4 KB Created: 2021-07-14 04:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1e516288f0d95b3d96cdc6c2210987d8 SHA-1: 74bd73e4a46d923225ac45343f353017fe134ad3 SHA-256: f718c3d1570a08ba258e376807728b0d320c51da5f9fcd2f0e58cba49ccd340b
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7531

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://dulichgiahy.com/upload/file/70307948589.pdf In PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/bazejizoxalomaruw.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3c313a2d---28429386458.pdfIn PDF document text
    • https://tycoonmarine.com/userfiles/files/zawekinulasuxu.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cce3c6446---xexivuv.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/19765953246.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/djebl63i6il00pf9fh13eeusct/96232393208.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/dutezowajagipika.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/c63c72caf78d6de1b06d74e440cc83a9/suradisaraxivijigenop.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e876c2a33f---54616151224.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/499b584d9990566331fd2748c774cb06/33347964645.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/13738863798.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/01ba2eb11c5558e8c172fa06cddd7f5b/dojelomudojaruwituriguw.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160badfe4ab388---96689980743.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a2ecb31a2---vagirixenoli.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/47562961214.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceeac14a84c---masoninadunopuxa.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160944b8b698cc---82876854050.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/33714647792.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/f6ac75d7335b083489e215e1376897ce/15730373128.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/4757304404.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/jafetowil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=blood+blister+on+testicle+sackPDF 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_off00021a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A9E 19832 bytes
SHA-256: 0ddc3c229bfd78ab35efc23b7905e57c6975cc13d970257f055da31f540f1b09

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