Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f25c2393b9650fd…

MALICIOUS

PDF

104.7 KB Created: 2021-08-18 02:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1e20043a016c4a15ddac1c63f9db91e3 SHA-1: d1b4290521a6756ff806c5f0509ac80e49afd5f6 SHA-256: 1f25c2393b9650fd8ea0b1287f71c9bc511aa516555df2f5bf595c8f561665c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics suggest it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/5169a6dff266ac4ce8053644df7be293/xiwakizikutoxaruvarimisu.pdf In PDF document text
    • http://ivelinabozilova.com/userfiles/file/62576998408.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5d3411d58ca9081f9845a98477c3e619/jaxamapefidu.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/20670274875.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/dapokadamitagezupaberi.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/xatitapinebabu.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210814145843.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/49463e2a9f07cc113d8c0dfc90c43b19/76755699016.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/46521539512.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/6849991564.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/b94a90479c7179de2cfc039d4540a68c/rolemivogamebizereru.pdfIn PDF document text
    • https://wsbtitan.com/images/file/zanov.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/4s4hla0cghj48f2vb211mfp6v7/fimunewomomegesej.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/20030704878.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/vatewutowekifogilumexajex.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/41ede6ee25bc4412fa3168c0151128d6/duredaginibovizedofiw.pdfIn PDF document text
    • http://carefirstyoungatheartgala.com/clients/b/bc/bc61c41cf33a111e4089ebab1e34a2ce/File/74980531304.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608334889e098---fumudomezuleteli.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8811b455f4---xisinatawek.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/80746471340.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/jagej.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/rurezilojipizotiripa.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/864fbdc1a25828a5016fa4f49756d1fa/96318903026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pack+de+jaime+malcriado+twitterPDF 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_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0E 18616 bytes
SHA-256: 22b6e96d3fd20831dfbe0de20a3fe439c4a3eec643fe4be633743c68e7467322
font_02_sfnt_off00017ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD2 10568 bytes
SHA-256: dd122d261679ad2ff5ec0b59a0c04b126417600879f4a1888948b2bfa14321f8

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