Malicious PDF — malware analysis report

Static analysis result for SHA-256 538b1716ce1990a5…

MALICIOUS

PDF

146.5 KB Created: 2021-06-17 13:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2023-10-26
MD5: 48b17d9acc8f9dfdd0c09c1b914c20ec SHA-1: 5db846b52e75a6d1528bbb8b23b76f88dde2477d SHA-256: 538b1716ce1990a5b6fe0b458b856bd26ba58629776ea7e14f8593c26eed3b34
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, contains references that suggest a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9725

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://smidgel.ru/uplcv?utm_term=lucky+patcher+beach+buggy+racing
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ca30728bf52---13068579194.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d312c30424d6ace95f8945509cf67cc1/36657394499.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081111b8e6f6---povonibotojifake.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ddf0b23990---77250188562.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608be37e194ac---sumareteroluk.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b0400e883---xipizapezapadisu.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6ed966d16332424d1eea77a94e6a2f2d/70218087817.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ba2924e9b8642e3d4c3cbf112c27fd43/gomizen.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082de625c95a---67749272041.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3663f05d4---64692326680.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf64a9233f---51377915981.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e21941bc64f3a1da7c4804382034d3b5/23929710366.pdf
    • http://com123.vn/uploads/file/93629524446.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/4af048be9b787daac6c2cf4560a0cf21/44728201268.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/q7ur74oja6pck9vpc97qepo9t6/35143790531.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019c14.bin
5692e5be98644d0ebf29a13dbafd7982e2389c2fe625c5fdcaa2db1760791c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C14 6692 bytes
font_01_sfnt_off0001aca6.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACA6 2952 bytes
font_02_sfnt_off0001b734.bin
3933a7eb1de958f21b04c311dbff13385af9ed027e1196010c7f99ed6a68db79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B734 5004 bytes
font_03_sfnt_off0001c838.bin
ddfce8daa94a4fa36efa67ad84477b5d555a2c7f58d6a3eb76fb60259a06c269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C838 8100 bytes
font_04_sfnt_off0001e3c3.bin
92b8e8a18713fcd46f2e2c825d132676f5b83337890acc0b5e163e67d57442af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3C3 15120 bytes
font_05_sfnt_off0002137f.bin
016c0b0a0182146420f9042e88034301234ea9a478618b4eb55269085e1993e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2137F 17232 bytes
font_06_sfnt_off00022cc8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22CC8 4324 bytes

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