Malicious PDF — malware analysis report

Static analysis result for SHA-256 b240050747f38eeb…

MALICIOUS

PDF

80.6 KB Created: 2021-03-30 00:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e44dcc58ba9c90872367be49537d431 SHA-1: 284089a702db30407676297c49638a078907131e SHA-256: b240050747f38eebb36147dd832170720bbfd12076527190a79924a71369e771
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and trojan activity. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/award?keyword=akala+natives+book+pdf
    • http://kulanefimolon.mypressonline.com/tijitogomozaxurasorux.pdf
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/nasisufusukolu.pdf
    • https://cdn-cms.f-static.net/uploads/4371265/normal_6052e7e688210.pdf
    • https://luwomobesu.weebly.com/uploads/1/3/4/2/134235002/b6f9b0c.pdf
    • http://jogedisilokazex.iblogger.org/reducing_relapses_in_mental_illness_worksheets.pdf
    • http://xazivigufimu.22web.org/minecraft_bedrock_edition_free_windows_10.pdf
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/569510.pdf
    • https://goxapuvuf.weebly.com/uploads/1/3/2/7/132741714/fojol.pdf
    • http://wigobike.sportsontheweb.net/mimirotazotalojujuzula.pdf
    • https://cdn-cms.f-static.net/uploads/4422645/normal_601a02338c4b5.pdf
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5ffce57cbba5f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_c5109180f45444c2b6cd5d1c8d544cf3.pdf?index=true
    • http://japatesaweto.rf.gd/wafok.pdf
    • https://s3.amazonaws.com/pirofopafu/92589003097.pdf
    • https://s3.amazonaws.com/doxifuba/86762263682.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_02e23836dfe34774ae41522100885d7b.pdf?index=true
    • https://s3.amazonaws.com/jesidofefe/agent_sai_srinivasa_athreya_movie_300mb.pdf
    • http://guxonijelosaku.epizy.com/watch_twilight_new_moon_full_movie_online_free_putlockers.pdf
    • http://kopolug.myartsonline.com/51042602257.pdf
    • https://s3.amazonaws.com/nefomojuwet/guideone_insurance_agent_login.pdf
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_9f10425ec7944d379473b434b1cb1c0f.pdf?index=true
    • https://s3.amazonaws.com/bidemewufa/chemical_properties_of_alkenes.pdf
    • http://ruronegiseko.atwebpages.com/astm_a193_b7_espaol.pdf
    • http://laxolagodofomug.onlinewebshop.net/94126907863.pdf
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_49c9f5a7e1774a129b2e818ff5ab7734.pdf?index=true
    • 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_off0000fd33.bin
adcf23309d669991fccb3c9994e78b09a5230b3bde2b553402a6598261b53721		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 5192 bytes
font_01_sfnt_off00010efb.bin
577b0c9840030ce0e8a85d461544be1ef56016965cf48b5ab2334f7ac4f827d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 11028 bytes

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