Malicious PDF — malware analysis report

Static analysis result for SHA-256 63102986c2423eb7…

MALICIOUS

PDF

87.8 KB Created: 2021-03-22 02:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19d90023afb36b26eb612e7343f06fa SHA-1: e6d853f7bc1db7d0c7dee75afb97402411a7d39c SHA-256: 63102986c2423eb759179ae4ea769b7c67ae82a81add9d27518dee36b175e535
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's content, though heavily obfuscated, appears to be a lure related to an educational project answer key.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=mathematics+vision+project+math+2+module+6+answer+key
    • https://cdn.sqhk.co/jategesil/ohfhgu5/96250309607.pdf
    • https://cdn.sqhk.co/miviterul/NkZifgc/parent_approval_letter_sample.pdf
    • https://cdn.sqhk.co/limexofure/iNgegiJ/xetikinamuris.pdf
    • https://cdn-cms.f-static.net/uploads/4366668/normal_6024eeda7063b.pdf
    • https://cdn.sqhk.co/bitowiso/jhfTaGE/topuxowodatejorizelazun.pdf
    • https://cdn-cms.f-static.net/uploads/4386335/normal_6021515bcc0da.pdf
    • https://cdn.sqhk.co/waketeni/ichdhgK/rudorebenimeregoje.pdf
    • http://stnold.com/how_to_make_viridian_green_acrylic_paint0oblk.pdf
    • https://cdn.sqhk.co/nujidegowupi/hiLAXid/light_it_up_lyrics.pdf
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fc8cf7886134.pdf
    • https://cdn-cms.f-static.net/uploads/4371808/normal_604cc98bc6ce1.pdf
    • http://mebel-albero.ru/articles_contracts_fle1wt75.pdf
    • https://cdn-cms.f-static.net/uploads/4448115/normal_60264995d4aa2.pdf
    • https://cdn.sqhk.co/rebabafa/4cIijgc/71672366122.pdf
    • https://cdn.sqhk.co/fulaxanew/haeihVk/battle_for_wesnoth_campaign_editor.pdf
    • http://opit.space/grizzly_hills_violin_sheet_music77pxy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0ecb0f6a-c61e-4c0a-8024-07966d6eda94/samsung_hw-hm45c_software_update.pdf
    • https://uploads.strikinglycdn.com/files/3bb6a883-3fc4-4322-b0c1-6f8ee71d82ad/swann_security_camera_cable_joiner.pdf
    • https://uploads.strikinglycdn.com/files/aad1b5ba-2f73-43b5-8f27-8e0cec3dcb61/dnd_5e_fighter_unarmed_fighting_style.pdf
    • https://uploads.strikinglycdn.com/files/7eaa79c9-97b0-491c-b4c8-1a80b83b694f/66414317322.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_off0000f439.bin
fa763f70197920411bf5d976148774d4937486adf65d2d77120ccdc0f707a74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 2904 bytes
font_01_sfnt_off0000fe9f.bin
8b82d32b4c731bccbe845703619cb874b6df8a2d1e0f2e4e57dddc009c893ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 6000 bytes
font_02_sfnt_off00011310.bin
b213b2891dd6b508fadf2164f723b18c2e099a343b51594b231faec80bab389d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 12080 bytes
font_03_sfnt_off00013c5b.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5B 16060 bytes

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