Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c49eda4121d3af…

MALICIOUS

PDF

129.2 KB Created: 2021-06-28 17:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf053a8b1ed2226fc015057c4506d776 SHA-1: ea7922c32b68575a2bdf1f6f6b6fd4f95c4d7c8f SHA-256: c4c49eda4121d3af131c292352bc14e454b08516d767636e776c4d8157e0f695
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to numerous URLs hosted on compromised CMS platforms, likely to distribute phishing content or further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://agrobud.net/uploaded/file/jamoxik.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d1685eaea---66608277943.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/25e116c76c1e9581d55e2d8c3877513e/35449753613.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/j9csrojtnsd2e88qruj9io9kt2/zemixipurofug.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/625edbe7833ee5defbb81a3f601ff066/95354583324.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e73fa91e9---37038475689.pdf
    • http://ipsgroupjjn.org/userfiles/file/nuviwe.pdf
    • http://curry-box-deluxe.de/userfiles/file/lazulazapefanuri.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0rre025l63pei5snbq0o1qhuj1/53902093861.pdf
    • http://malagi.pl/user-files/fck/file/wofepofazajiledi.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090933d761b9---65673161145.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5eb0d4424d544d1d12c91601ceb4d8f5/tisasewunenawop.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/cd04dd483e8653c05e2d0e14babd03e8/35920966646.pdf
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/liwamusojime.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d8b70ba2---pisunolevobak.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad264b4bed---35498702421.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3ae45ac11---mibozimobadolo.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rrnsjl6d2ogjmmkq6s85gs0107/77898199749.pdf
    • https://kildevangen.dk/files/59969471858.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/80620706630fe7ef56092bcdbc24d553/78560830104.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/98a33803b31d73b7b8943ab2fac6be1a/wematomezebufo.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabd59c466---14481486788.pdf
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/4280709712.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=snow+white+seven+dwarfs+characters
    • 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_off000197f9.bin
e2c3793ab800aefa0ce07ba0f76cfaec1cf355862631f78ca89ecf26cb7aeee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197F9 18468 bytes
font_01_sfnt_off0001c6d9.bin
96dce4758d31d126b9b7efaf1e3a9c69c131b8ea13438a1fe49c23b9dbd45517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6D9 10752 bytes
font_02_sfnt_off0001df9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF9E 16792 bytes

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