Malicious PDF — malware analysis report

Static analysis result for SHA-256 96049194d39be207…

MALICIOUS

PDF

100.3 KB Created: 2021-07-05 08:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc8f6dccbaad6caea8d252a662d83c66 SHA-1: fbc3a53d0502d9a8483795a8bbed14a79be51855 SHA-256: 96049194d39be207f5f79ba5252ef2b70440d30dc359f2bb7355984e3b3888fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm on potentially disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://krisoc.ru/uplcv?utm_term=rise+like+a+phoenix+meaning
    • http://lawrence-spruill.com/clients/42275/File/601769505.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712472d9c82---58133897139.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093f5777b3a7---xirebolonowobixuvuloruli.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/fd3d4a7bc95ed69fca304b9d5b5ae21c/49553529075.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d043e6ab8---dovukepalawamutawa.pdf
    • https://next-engineering.com/userfiles/files/5724051490.pdf
    • http://mea-travel.pl/userfiles/file/lolumomafilurutazulipan.pdf
    • https://autoroman-service.ro/imagini_ws/75789454352.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b599220e177---49357585265.pdf
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/67706312890.pdf
    • http://ehomeforeclosure.org/images/file/vuxifitafusufenupiva.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080655dd591e---81270715736.pdf
    • https://watertorens.nl/userfiles/file/gatinodukizevozupalux.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/af2764b866dc47d75e647dec6382207a/nabewus.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608989bb3f367---zixetewiwa.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7bccd076---dutenilolusekumapagebazuk.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a312bc6dc4d---jibumipu.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e2543fba1---getonowalaxogabumigoxadu.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/49b7eb22d2a760bfe57b1e9afa21e324/siporutusugox.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9e54261e426dffba7f4954c076fd291a/98600038249.pdf
    • http://thecreditcrisis.net/clients/73966/File/jigososixusiravuga.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/m2e6r5kgi9706sjfarge0oe2uj/tufidi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001600b.bin
6c092affcf9be47ab0cb7c6f2f9afb35983a856977940325cb8151368fa1d705		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1600B 20176 bytes
font_00_sfnt_off0000ecaa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 16792 bytes
font_01_sfnt_off000104bc.bin
10bb44ea4bab0f5bc71c529ad6de81bdbe92feb41f5a86cf3b0a1bd4ad19934c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 22504 bytes
font_02_sfnt_off00013d53.bin
2cb67a60d1815e45f5b5bfb2645eba9ac7e33a710017cd536a849f5a6962b216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D53 10740 bytes
font_03_sfnt_off000155c6.bin
75d66e9654d2172e6ef9a5270f4ee0a5b8615eaffe2e50b9ec2cc0f04a90c214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155C6 2416 bytes

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