Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d30a4e6a5337862…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 17:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7bb24b279cc7104b9e987f3e9bd732b2 SHA-1: 1773ea15a4bd83a172adc91c7dc0ce20541aa867 SHA-256: 9d30a4e6a53378620e811346749c38e9c430b592a5cd5f14487b9430bb1e8859
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous external URLs, many of which are hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://broadcasthub.com/ci/userfiles/files/32615292381.pdf In PDF document text
    • http://didopack.com/files/fujuviro.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/86412011437.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/81545647206.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/nunabotavuwusotaloz.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/86922611145.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/96815650039.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec473f7e0---ditimevudijinejomunif.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/venavubulolexikamopavar.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/rodipejepanisekimoke.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/94608114697.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/79030280853.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132783575a15---73111610792.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/tidiw.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/sesipobolugunofug.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/tipijuboma.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/gogogisalekod.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/kigugapakudi.pdfIn PDF document text
    • http://fitviewer.com/files/file/ferawomud.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/64419500039.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/jozikelupemopi.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146587b6dee4---18517846635.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae5340b1ce---3749690443.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/finodenukovexemovag.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0ecdbaac3---22720781546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=iphone+vs+android+alarmPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 10576 bytes
SHA-256: e997a01c74f173e6edb5b013d23cb380bb64580ade3d79d0a4805ecb799a5e81
font_02_sfnt_off00010dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 17340 bytes
SHA-256: 3de3de808a8da53e0848cf710bdb842fef646fe51aa1d4232a9ef91af575e06b

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