Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a6ce4e3ae6ecfe…

MALICIOUS

PDF

85.4 KB Created: 2021-07-26 05:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffcadd4aa019ff1a65a51eca5f7c617a SHA-1: ec3ba402444c78919b47c642e851cd8d97f7e6ca SHA-256: a8a6ce4e3ae6ecfeb17eac258839c5eed09ecd5a504a49bf2377555866c738a4
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 functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00b781ae4b---26929550748.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/27314442595ef03a036e2137d2cf4874/40077881363.pdf
    • http://faradbox.pl/files/file/pupagevivekaropevanebizod.pdf
    • http://rund.cz/UserFiles/File/bupiwamilopuferijis.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dbee00609---lenofonoredawadiratura.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/63306edc02b6d98a0fa471b5d5b22a90/wutelorivuvojinamix.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b11731f2b25f72681973918b561ef670/ruragixur.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607673aa5cc5a---76053455908.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/aunaq9bsu1o4fntvrthbhve0hg/vibazulukitif.pdf
    • https://livre-art.com/ckfinder/userfiles/files/12227927953.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/labotawejozusumonejow.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a095aad53f---51301593547.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094deae48c31---14598613212.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/3ba4823c747e1f57b7fbf95c0e4100f7/31801061774.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b812ebc58a5---4976350649.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f8568bbec24a38c969b008342f7cb148/wemazesezupanujuxoxu.pdf
    • http://yaqeen-eg.com/userfiles/file/96402683541.pdf
    • https://poolpoint.be/uploads/file/36212311158.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/inisqq87ugdh43an09af7oqsaf/noxekerarelipirame.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d58858c69b---febudavuj.pdf
    • http://aldara-latinoamerica.com/userfiles/file/16528627240.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7896979c17---45912947724.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737118f0ea7---nazavi.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/54244153921.pdf
    • http://brooklynsmokeshops.com/admin/images/file/46747603227.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba501b7e8a7---pufimifazerudamazevebawat.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32541f4e3---48054879882.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/55272854529.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kaun+tujhe+female+version+mp3+download+songs.pk
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 16792 bytes
font_01_sfnt_off0000e802.bin
a01c5ef2fd2fcabfe045879ba50610c699733d27bfdb36cee9bd3af6467a18a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 11648 bytes
font_02_sfnt_off00010359.bin
e19b7747425d0f5fcb6a55afecb55d6efcaf0d2cbbd27a7ffc2abfd8959c4f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 16788 bytes
font_03_sfnt_off00012f6d.bin
6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6D 16384 bytes

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