Malicious PDF — malware analysis report

Static analysis result for SHA-256 caacd6d2f7ff2f0b…

MALICIOUS

PDF

66.9 KB Created: 2021-05-06 17:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 095f4f96fa1f040eb2f4f0a5168683ee SHA-1: 74738ea3c61ffb7e6b1a1b9e2f888c4163598513 SHA-256: caacd6d2f7ff2f0bc819eb5fafa7c67280508faf1a2929aae3f2f658316bf7b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on compromised websites. The document body, though heavily obfuscated, suggests a lure related to a weather report, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607787e16e7ce---60488829321.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b12de1d8c7---zibamesizexeragarusebej.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072241a117a5---fizabazuwipesivug.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5cfe740c---kimenad.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07fbbf48a---3816129998.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/697913abda09aa23750778bfecaff0de/gijulojesoko.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/15746dad3d91a8074278e94f05d80b23/xonojivelevepolanoraxulu.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/0e7810b810450892472791c8a72c2174/7123394211.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1b5df4fc229dd019bb5cb0ae091027ca/57967631773.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61f70ae21---96427412603.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/fa3bari7lr4m1o89odhc8bak6e/zenuno.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8383ee67---49382103521.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/qgvalq5blk80prbs18molag2sh/kifemowikato.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/cf1ef615b8d4ee780d0e3668e5deab84/69557853282.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/23d1b3bbbc3b30e13376204f1d69cd6e/makonazemutizurupomepor.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faae42dbad---44034206502.pdf
    • http://ats-dz.com/userfiles/file/79299760013.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1ff967723---59937490666.pdf
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/g1ca0srqvhj0dmhobjfrhjgdo9/57559109886.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=weather+report+in+mysore+city
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c941.bin
eb973f496690732ec4a7a332709b2bb22b12aefce983ca9642094b0ed67b4101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC941 5256 bytes
font_01_sfnt_off0000db0b.bin
b95f91b380db230abf0b2b91e94baf020fd116630d90f4bc20243682855c62c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 10344 bytes

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