Malicious PDF — malware analysis report

Static analysis result for SHA-256 f003868f63c6f70b…

MALICIOUS

PDF

92.6 KB Created: 2021-06-26 07:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 235fbfca2e37aae8cf129f9ff94b16dd SHA-1: f44be583500fd9a934f4d87c02765f7a9cc88eaa SHA-256: f003868f63c6f70b13ba5859d0afac6242ce60c25743cfd0b23ca0c2e28cfb9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://catamma.ru/uplcv?utm_term=loneliest+lighthouse+in+the+world
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082005780eca---zumopuja.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/fa25981a1ab4ce4ddb4768798f87e054/51641010876.pdf
    • http://hurtmar.pl/Upload/file/4874126844.pdf
    • http://kstarsmall.net/userfiles/file///68659999050.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bobixarubomataxaw.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2da0337010---sidoxidapaniselemoz.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/39533603147.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/sivulogupawiferodukisug.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f522f748b8480c795c9badd860f639b8/kimurukifamamoke.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e97ca3cdd---24497729789.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160716e8601e91---51396033387.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085303c191b8---zexezevobepabexuxeto.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad151cff69---zejijor.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/4a0f75985971d59e6b5469f702ee6ce5/dodapexisatoxu.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/45490a065df382cc4d0941c89c117227/40926141484.pdf
    • https://imagebeaute.fr/userfiles/file/27788360182.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b58279ac1c5---58640488983.pdf
    • http://naturallabs.de/userfiles/file/pemukijepivej.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/pc1261q5ncd19op2m07885nb94/tasubudajuji.pdf
    • http://www.tobywells.org/media/fckdir/file/85239223708.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3785a1755---vurux.pdf
    • http://bawaconstructions.com/editorData/file/75583375718.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aec2d47c8---52518037176.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/07794abaea0d7cff392a290de6cfa46a/88599552075.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010074.bin
a64034b27b60f68e2007e3a8418f37e79c2f44e6efa74426cfdddcd8db1d2fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 19836 bytes
font_01_sfnt_off000133bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133BC 16792 bytes
font_02_sfnt_off00014bd3.bin
a486bc9a2a57d2476432ef85b7d976afc6f252d70d96e1f907f5571077cb885b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD3 10508 bytes

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