Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adff287b3bb501b…

MALICIOUS

PDF

86.2 KB Created: 2021-06-10 07:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c33a2940393e7960ebd0bbea9cf2262 SHA-1: 2d48d832eb89315878db309cf2664ec8ef6f693a SHA-256: 4adff287b3bb501b8e4e111d87ed0fdf6799619612bac312aa1b31cd72e08004
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains references to movie downloads, indicating a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/uplcv?utm_term=avatar+full+movie+in+telugu+hd+online+watch
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fcda85826---votirisuraxarowilisuki.pdf
    • https://securityguardsupply.org/php/uploads/file/jedis.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3e77ef54---7280881404.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965a5081acf---potiwigajur.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c8a464f2c---jaxilovorivubavogajaj.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b0b43963f---zufevowuxozewesapujo.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/291875bb8e29a5414b428dff42c196e9/sisinuvebajeniluvozapa.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac08c1c0208---36406927441.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160822d4e12968---29256789165.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b8eb3acdf1c687d830ce8759a9018c76/16766068228.pdf
    • https://abe-rdc.com/userfiles/file/joganeretazomadawofa.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160989775ca5a6---18580492799.pdf
    • http://kojeneckezbozi.eu/userfiles/file/subijomimapipetopininiri.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57da8f4e6---xatarebixogi.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/aa6ef68c75228818652c0a0b295e4b84/79643353333.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011258.bin
40ef79baeed90c8de921fe7a6d27881595b1d456ef005f9563b71cfbea3686df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 5396 bytes
font_01_sfnt_off0001249e.bin
b2600bb0040643b4db2b4891876e21aebbcbcd5c5a48fd8099c86eee2aedd908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1249E 11608 bytes

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