Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f66e04c0a94f4a4…

MALICIOUS

PDF

73.8 KB Created: 2021-03-11 05:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6790a61c46c422994d0528f088e5259 SHA-1: 4a257daabc503e8fbddffb57ff8ee8306f7a1f32 SHA-256: 7f66e04c0a94f4a41470fe13c98332fd11024a3cab37262a61d8800107114101
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was flagged by a machine learning classifier and ClamAV as malicious. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. The embedded URLs likely serve as part of this lure or lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ponafet.ru/123?utm_term=latest+chrome+for+android+version
    • http://kavanepamor.iblogger.org/ghatna_chakra_geography_book_in_hindi.pdf
    • http://beririka.scienceontheweb.net/how_to_easily_win_an_argument.pdf
    • https://cdn-cms.f-static.net/uploads/4402280/normal_603c29aeb7305.pdf
    • https://cdn-cms.f-static.net/uploads/4425507/normal_60435c29a4859.pdf
    • https://static.s123-cdn-static.com/uploads/4412896/normal_6008943412e59.pdf
    • https://cdn-cms.f-static.net/uploads/4467926/normal_601af274ec944.pdf
    • https://static.s123-cdn-static.com/uploads/4402014/normal_60052fc0f2a7e.pdf
    • https://cdn.sqhk.co/jugemito/LTjfsjg/koxotiwepowalijoso.pdf
    • http://lejunuzegakikuv.mypressonline.com/tilikoxafaw.pdf
    • http://lenuvivureropi.scienceontheweb.net/tokepir.pdf
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600fb50c17acf.pdf
    • https://cdn.sqhk.co/jogeguzotire/hdjhib4/cruise_deals_royal_caribbean_2020.pdf
    • https://cdn.sqhk.co/lefuwaregew/jhYgcHi/jetpack_hero_miami_crime_mod_apk_android.pdf
    • https://cdn-cms.f-static.net/uploads/4445116/normal_601f24c795aec.pdf
    • http://lijovafe.22web.org/how_are_scout_ranks_earned.pdf
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5feced694780c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dovunufesesiz.onlinewebshop.net/mandolin_for_dummies_free_download.pdf
    • https://s3.amazonaws.com/donukadizolin/sunbeam_bread_maker_recipes.pdf
    • http://kupikobu.epizy.com/vapenatanefen.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/freeze_your_brain_sheet_music.pdf
    • https://s3.amazonaws.com/kaxukok/sejim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55b.bin
2c862cf43dffd17681a7115b18b141f056f41d21224482b7a88af1c76c52dadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 5228 bytes
font_01_sfnt_off0000f706.bin
515b457ec2d5be0fdddeba5aa6143509c81f069f46573715bb61d2ac110020ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 10200 bytes

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