Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7a92cf66bfae4f…

MALICIOUS

PDF

69.6 KB Created: 2021-05-10 22:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc9355b735fa25b27fc3269217f8517 SHA-1: 7e11cba3c34e169b1e6cdea58daed04968e24cf0 SHA-256: cf7a92cf66bfae4f38e057735d440509ccf0c649f4ca210f5f873b54c902b7af
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 disguised as legitimate software. The document body, though heavily obfuscated, contains references to 'Lexis audio editor free apk' and 'wkhtmltopdf', suggesting a lure for a software download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/dkecn5au2gdodqa3eephcca2a3/jojixaxopesumel.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3820b9ed9---59434668400.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/b27db618197c161c2ce5e020873b8d1d/derimazud.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb3d79bfa4---vibasanuloravera.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/3156f34613e2f8e212c20e8bcaec260f/bitemadiresale.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3dc4a805cd6fde0d75196a6803cb56fd/beditomamizakalaka.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f69ac81806600da27bed1214abffa3ac/dipelufejeta.pdf
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/9de5d74fa4c08c0485a854f1af7931b7/92980202616.pdf
    • http://altaprecision.com/userfiles/file/timesu.pdf
    • http://sotel-perm.ru/site/file/62601753230.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16b60db2e---suribulumozuzuxubeborabud.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/o7i89bsdsp9j53rbaa88rfdtcp/fefatux.pdf
    • https://amrapalispot.com/userfiles/file/pixokudefetolufezagaxeke.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092444853c---korosuvarubub.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87f6d68f0---gopamo.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4436479f9---movoselurerutev.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/64af79f66878b0553b68a57215ad9c7b/mokikonuxibe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=lexis+audio+editor+free++apk
    • 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_off0000d27c.bin
ed4401746a18e85aff0b336e10a173b37e387022408210acad65737ce87e1250		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 5076 bytes
font_01_sfnt_off0000e3dd.bin
a2ea1d838c1b5e5e81edc6d20c1120098a0c37e68073137c6a2692c419ee5bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 11012 bytes

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