Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae3e91bcd01487d…

MALICIOUS

PDF

43.1 KB Created: 2021-09-25 01:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9155135149b87b58140c32f8b4b094e SHA-1: 6c1447cda6c5e3f9c62470bfa2a4457c86f42a1e SHA-256: dae3e91bcd01487de02451576131ec65c02377c4226c06146628fc67ec50b6fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7464

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://crysiq.ru/uplcv?utm_term=google+android+tablet+app PDF link annotation
    • http://jingyitech.com/uploadfile/bedinupolonuleruzuluvu.pdfIn PDF document text
    • https://fptica.ru/images/file/79771610492.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/kigunipega.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/88647129569.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/55170929100.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/rexoderuzupa.pdfIn PDF document text
    • http://clerus.hu/files/file/21896095965.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/82674546904.pdfIn PDF document text
    • http://domuran.pl/files/file/85023839792.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139dfe29fcad---wilatibizo.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/32147553206.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444bbbadcad---julijovibegitodil.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/f54687af26253034cc574f9d7f146f42/80466439535.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2de2371ecb56191102d350e98081cd84/2046623602.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/62337982441.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/59196238329.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd6df75e34---nedusapapomafitikaso.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/89231528071.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/bazaf.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/99763543102.pdfIn PDF document text
    • https://stauber.lt/images/files/15743342050.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/bazonupudizakifileda.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/wimewivum.pdfIn PDF document text

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