Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea9c0d2877a7f31…

MALICIOUS

PDF

57.2 KB Created: 2021-06-04 14:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecee903e82e7fd22bb4ff49b90eb3f92 SHA-1: cd309a8ce45fc3f78dbc9605389cf108bd5e7016 SHA-256: aea9c0d2877a7f315307ce90c06d798a450506ddb376b8e72d75d5aa7d238210
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, but no explicit script content was extracted to detail its execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6956

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://infrive.ru/uplcv?utm_term=sample+letter+from+doctor+about+medical+condition
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609a667c08b18---9207149060.pdf
    • https://airflow-skateboards.com/upload/file/68273890311.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/jej9g0emgk43rr4lkc81f6atqi/vugovolurerogafuwebatasi.pdf
    • http://otoozevran.com/resimler/files/27778922138.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05ac9ce932---xozogivoluwofozonog.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769cd08046---noferoximemigozorefa.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160add05845072---xigojidepimapusigofiziro.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1fe9885ae---25000646062.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a4c0a55eddbbc12a2ed84a65f3e0ad8a/rabujimado.pdf
    • http://frangarcia.eu/upload/file/farovonavusada.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079b5760351d---68347442699.pdf
    • http://midel.me/userfiles/file/xeranutupuwofesupelilojas.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e8c13cd12---nexepefaf.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9j4feq92075308g39qqc0sivq6/jitupope.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f95e733cf---39028373405.pdf

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