Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d34c5998cc1e141…

MALICIOUS

PDF

75.3 KB Created: 2021-05-06 13:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb1c9e34cf649303dedc54e97eca108 SHA-1: d03167bd60db6e329c898af3f9aaeae84744a8bf SHA-256: 8d34c5998cc1e141ce75ae1e50ddd4853fe4352b6e17df9654fc700ee3ead783
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs suggest the document is part of a phishing campaign, likely attempting to trick users into downloading further malicious content by masquerading as a free calendar template. No scripts were extracted, limiting the analysis of specific execution behaviors.

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 https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ri6kp84jc7tpk546f3h1j8q55p/dezivuvo.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3abe02c0d---19977686814.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/020f42b450e95a18483d7256891480ba/danijazafitimigamikorujux.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082c2a624a73---76163277445.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160897003b4d1c---94658908865.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ae738201---65369218329.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/su7bt9cs5qqapvqcui5ka2n45g/25535066328.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/7b319fd30a87390714ec3b67c0921469/levir.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/92720dc4850c774bf4a1a3070e82132a/reluzujurorovevowalusiwiv.pdf
    • http://adveotec.com/img/file/34727405268.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/763e8fb6aee0837c3c071ff9f09ab613/lotosukuninef.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd19853f14---83299755150.pdf
    • http://ahkjt.com/upfile/file/75433446386.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3f7df72e---doxatowatogadidumuj.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cde4d5fee---64441062444.pdf
    • http://gtshotel.it/images/file/tegutepadagafurix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=free+calendar+template+2018+editable
    • 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_off0000ea3c.bin
a16c523193b8084ae3982e4ecc9cc61afd24562215da5ede5c9d0658975b964c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 5656 bytes
font_01_sfnt_off0000fd5b.bin
656c9d28df74cf2fafe096b737205a327d30067d234f125b023d4d60bd8c0a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 10148 bytes

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