Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22b499ab826b696…

MALICIOUS

PDF

78.0 KB Created: 2021-03-28 11:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cce88d5d5daa604e1fa0c78f5732463 SHA-1: a2f9cf9f683ca412cbceb388ede085ce45387b21 SHA-256: f22b499ab826b696d6cf401ac54ebbf70b571ebb01d799b25b08a9bf9e10efcf
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to Arduino, suggesting a lure to attract users interested in technical topics.

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://jumiwimov.ru/strik?utm_term=arduino+how+to+control+speed+of+dc+motor+without+potentiometers
    • https://cdn.sqhk.co/mujawiru/aFggqod/best_buttercream_frosting_recipe_for_cookies.pdf
    • https://cdn.sqhk.co/jotapepikota/gHH13BT/starz_encore_movies_schedule.pdf
    • https://cdn.sqhk.co/gopuxipo/5idS0hg/77348855351.pdf
    • https://cdn.sqhk.co/lazemowul/aY8dRdE/dupuwobal.pdf
    • https://cdn.sqhk.co/tokofape/KhgXjjn/woodworking_plans_projects_uk.pdf
    • https://cdn.sqhk.co/vinasujitupe/ibgibig/15283297498.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wogikokuzotaxa/cogeneration_design_guide.pdf
    • https://uploads.strikinglycdn.com/files/cf2214cb-dd28-4b10-a974-b28a802198dc/my_front_loading_washing_machine_wont_drain.pdf
    • https://uploads.strikinglycdn.com/files/2b228860-1bfb-4a66-b367-e0ed6de4e7c8/the_wild_unknown_tarot_deck_and_guidebook_review.pdf
    • https://uploads.strikinglycdn.com/files/84e128b2-61ee-482c-b24a-4def5ce11340/50886479055.pdf
    • https://s3.amazonaws.com/gedimuta/call_block_free.pdf
    • https://uploads.strikinglycdn.com/files/3aefe921-11a1-48d5-952a-425b79b8a216/diono_radian_3rxt_safety_review.pdf
    • http://sugunava.epizy.com/putetukifogi.pdf
    • http://domulogud.epizy.com/wozavodenefobaba.pdf
    • https://uploads.strikinglycdn.com/files/38a5d47c-19f5-4973-a63b-8750f0f0f7c6/critical_review_of_a_journal_article_format.pdf
    • https://uploads.strikinglycdn.com/files/b1b0cdad-9bd9-4645-83f2-6a9ab1226e9d/michael_talbot_the_holographic_universe_download.pdf
    • https://uploads.strikinglycdn.com/files/b81f4a94-0e00-43e5-8a64-e1198147356b/70105203992.pdf
    • https://uploads.strikinglycdn.com/files/f88be96c-bf19-4347-8180-9050606726f3/viziwipagemonu.pdf
    • https://uploads.strikinglycdn.com/files/b6c98939-7838-43a9-8cc7-750b37ee1613/gijiridasinekesegi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ea.bin
a0bcfd0be5cccc2af59b584a83b616ecf79b388e51b2eb56e3e6fd5f07aadb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 5148 bytes
font_01_sfnt_off0000f84f.bin
c986182b60a7a646ab47256a621ba761dea8f0510ba303633ada3419f29578f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 10496 bytes
font_02_sfnt_off00011c37.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 4324 bytes

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