Malicious PDF — malware analysis report

Static analysis result for SHA-256 389222e99f3b5fb5…

MALICIOUS

PDF

89.1 KB Created: 2021-03-21 03:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 826376a3e14b9b9301578e9b867e07af SHA-1: 9ec41b400de6ebeb2ded1297287f41b30f87ec3d SHA-256: 389222e99f3b5fb5f7a48328a2b44ddfb8d785237606e9e62c05e8cbbecea8d4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://seumenha.ru/wix?keyword=3-4+systems+of+equations+in+three+variables+worksheet', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be related to educational content, likely a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://seumenha.ru/wix?keyword=3-4+systems+of+equations+in+three+variables+worksheet
    • https://cdn-cms.f-static.net/uploads/4412174/normal_601b3caac10ce.pdf
    • http://eroganoficial.site/42775828055veyoa.pdf
    • https://cdn-cms.f-static.net/uploads/4420748/normal_604a3363582b6.pdf
    • http://lorezagosuvese.scienceontheweb.net/makotonijitatafowaxanudug.pdf
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdf
    • https://cdn.sqhk.co/koditisalupe/Aiito1N/pongal_2020_date_in_tamil_calendar.pdf
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fd3ce4bc6f1e.pdf
    • http://runmasten.online/mefamebu2mig.pdf
    • https://cdn.sqhk.co/madeparev/ijdBpjb/zero_city_zombie_games_shelter_base_survival.pdf
    • https://cdn-cms.f-static.net/uploads/4404969/normal_60519fc373843.pdf
    • https://cdn.sqhk.co/wivinapamir/aOidyif/68279777134.pdf
    • http://lasleymarkt.ru/jazididakunagidifotabim55fo3.pdf
    • http://xunarepozufuz.mygamesonline.org/formative_and_summative_assessment_in_the_classroom.pdf
    • http://suzupuwejal.mygamesonline.org/gallbladder_stones_diet.pdf
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcf2f9d7968f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ritoma/82163684782.pdf
    • http://petilawunabebi.epizy.com/you_re_not_sorry_piano_sheet_music.pdf
    • https://s3.amazonaws.com/lorifumofelu/21115964486.pdf
    • https://s3.amazonaws.com/zisulamisozoto/basecamp_windows_xp.pdf
    • http://seroritubofa.atwebpages.com/circle_tangent_theorems.pdf
    • http://webamega.epizy.com/wexudezu.pdf
    • http://tobifovibel.rf.gd/english_standard_version_bible_download.pdf
    • http://dozokefonusabo.rf.gd/sejorameki.pdf
    • http://wozowopug.rf.gd/36753516986.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_off0000fbf1.bin
d6f608575984a882b16b87cce92a0a201f7da7ddf846f1bded899fe5b08a1ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 3396 bytes
font_01_sfnt_off00010794.bin
27cc1e6e37207de6ac1a0f34453e0885c0647210eef3504e34d5d689ecfda9d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 5780 bytes
font_02_sfnt_off00011b43.bin
17249cc93520f5e5d04bfee42c28a9bdaa0386b64d4d1e051aafa894faf6495a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B43 10768 bytes
font_03_sfnt_off0001406c.bin
00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1406C 16140 bytes

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