Malicious PDF — malware analysis report

Static analysis result for SHA-256 002356e3d0e24512…

MALICIOUS

PDF

105.1 KB Created: 2021-07-09 18:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 131a4f785b60bde0e75f45dedf85dbe7 SHA-1: d2b7194939373993b797915437870cb65542a32f SHA-256: 002356e3d0e24512d225e2a62a9a38f8449c6614a0753e707253baa9ff1896fc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely serve to redirect users to malicious content or download further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7636cf8a2---zipese.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/iahc4aomvn79hju45r7626g0a7/denedofevufigux.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e6c565fe666b9c54720619581e9c0cb/82338161767.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/f7fb2dbeec53fc27049832ed3ed62902/fenuwevov.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073d74d2398c---39306105154.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d40e25a54ae---dalozo.pdf
    • https://schmitz.cz/res/file/tepirolegujilumatexax.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/q4bt55in9obg11p744t1bon2id/xajimepukuvavizi.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070d024a74b7---nexegebuxunimevof.pdf
    • https://paperland.bg/uploads/file/1519898793.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/57062e9e2a10e24dc9eb4ccc2ebcbbac/28554560686.pdf
    • http://ackerviewguesthouse.com/userfiles/file/88293728330.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097b0c074feb---72159929506.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec711a94b1---zuvakabosarajejubekisu.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/avd2qo9dap7lg4efk6hiuc0hu0/revitif.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5lnujd1ljlipstvqdu4jovtdvh/rorimurowupativogexewenax.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099b8c9936ff---35345643738.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0hjk345qnv4s8sqokbshopd68d/44331135704.pdf
    • http://simonhoirup.dk/userfiles/file/kepodun.pdf
    • http://cartonwrappingmachine.com/userfiles/file/32285669475.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/f69nb3oo6u100ttoo18n4uo8mi/funexeroj.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd6407957---nonatedexixutatuvubej.pdf
    • http://studioarclab.eu/userfiles/files/76003113509.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8584b467cf---xisotirij.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/af2109d1e4e7ee42dc536aa17ef60ec5/98729086542.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+does+a+pet+fox+eat
    • 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_off000138b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B5 16792 bytes
font_01_sfnt_off000150c7.bin
382e29e1a319cc2292e7c0f4a11da5001bdaa8d7447fdc3e3afd913e1b52da54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150C7 18220 bytes
font_02_sfnt_off00017f86.bin
fa37b04ea7a805625792de50b508adce311a89aeee45ef8b18ca084e783e10cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F86 10348 bytes

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