Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc275dd7788abc8…

MALICIOUS

PDF

84.3 KB Created: 2021-04-03 22:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 786e3e0add1e95738c33f428d584cd02 SHA-1: db6d0454a663b6a0a587211ff25f665292f8a459 SHA-256: 6fc275dd7788abc877e6a666a0a7c41f531c9acf024de016592d1bcc0823b961
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to 'license renewal fee' and the authoring application 'wkhtmltopdf', suggesting a phishing lure. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=ma+rmv+license+renewal+fee
    • http://getplafond.xyz/how_to_reset_a_remote_start88asc.pdf
    • http://robinmani.site/lord_of_the_rings_trilogy_books_box_setffops.pdf
    • http://medicinfo.online/tada_kimi_wo_aishiteru_vostfrv0xp0.pdf
    • https://cdn.sqhk.co/melipetoluf/jdtJrW0/csr_racing_free_download.pdf
    • http://mumolazesinidix.getenjoyment.net/degaxefogexaxerotitowof.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/wipedekis/dOa6hi4/55338041395.pdf
    • https://cdn-cms.f-static.net/uploads/4423137/normal_605c6dad85224.pdf
    • http://roxelejabojafe.scienceontheweb.net/gurobimamavazalobirozekax.pdf
    • https://cdn.sqhk.co/pisimebuziz/gjjmmrX/invisible_background_iphone_11.pdf
    • http://nuxokavarop.22web.org/24554029323.pdf
    • https://cdn.sqhk.co/resozasevej/ie6hbhd/80022985804.pdf
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fedea745f611.pdf
    • http://nefozufovi.scienceontheweb.net/behavioural_activation_get_self_help.pdf
    • http://dabiboniner.22web.org/what_is_futuristic_architecture.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_fb7cc68ea4ab4117b7d544400586c940.pdf?index=true
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_1a2d0f8f6573421bbff6d40e5fe6ad7f.pdf?index=true
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_71f16c5d20914adfb3ff241792ce5187.pdf?index=true
    • http://marivugedada.epizy.com/brain_tumor_medical_report_format.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb58.bin
ce17e28ce5583f4a33fd5fc4ebacc2a87afc5d95dbd9587e7a9833088d13b5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 4780 bytes
font_01_sfnt_off0000fb7e.bin
a7cae7e115d2970ff600c81fab3c3e101cdf80ed7ff0f13cd309ec1206bed320		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 10848 bytes
font_02_sfnt_off000120e1.bin
6793135c9d5f2d9402216549edf66541f87ac1c2d7f717693568b2625ec966b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 16084 bytes
font_03_sfnt_off00013597.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13597 4324 bytes

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