Malicious PDF — malware analysis report

Static analysis result for SHA-256 148b44207d8232ad…

MALICIOUS

PDF

78.8 KB Created: 2021-03-22 07:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9508bdd454bd02dfde29b494896e2377 SHA-1: 78aff4ee9d5d7ad2d157d9669e48ad8133a3e74b SHA-256: 148b44207d8232ad95bb08d9ddb18cfe21f9afc1690f039dbc815e8bce5e0d2e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, contains keywords that may be used in a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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=blackboard+ttu+law
    • https://static.s123-cdn-static.com/uploads/4444353/normal_5ff457dc97927.pdf
    • https://cdn.sqhk.co/jekefebiba/1gficid/92122961261.pdf
    • https://dojixevagix.weebly.com/uploads/1/3/2/6/132682303/20ff8540baf.pdf
    • http://sizegoduxuxa.mygamesonline.org/biochemistry_books_for_mbbs.pdf
    • https://static.s123-cdn-static.com/uploads/4391001/normal_5ffb1342b7dd9.pdf
    • https://cdn.sqhk.co/fagaxirupunu/hh6hajd/rixisivi.pdf
    • https://cdn-cms.f-static.net/uploads/4494429/normal_604f1a867bdd5.pdf
    • https://cdn-cms.f-static.net/uploads/4416510/normal_604b53af565db.pdf
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcf9e5b0c49e.pdf
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/bibevujukepo.pdf
    • https://static.s123-cdn-static.com/uploads/4388629/normal_5fe1c61319bcd.pdf
    • https://cdn.sqhk.co/rokijatu/jbLDgd4/jenakokevipap.pdf
    • https://cdn.sqhk.co/zozevuxe/hagfDwF/80786072533.pdf
    • https://cdn-cms.f-static.net/uploads/4445114/normal_60501492f0810.pdf
    • https://fowemofuf.weebly.com/uploads/1/3/1/3/131379389/tulivunaxumolerewi.pdf
    • https://debesawoxud.weebly.com/uploads/1/3/0/7/130775383/2715400.pdf
    • http://kojazunupetip.mygamesonline.org/fitalafu.pdf
    • https://cdn.sqhk.co/pigevikuwi/ijT1m7l/shadow_fight_2_weapon_hack_ios.pdf
    • https://cdn.sqhk.co/vikeguzag/izjiyjf/luwusugimozodajiri.pdf
    • https://cdn.sqhk.co/vozedolurezu/ja5u8gc/august_2020_calendar_with_holidays_gujarati.pdf
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6022b07b4f276.pdf
    • http://saxobupazes.sportsontheweb.net/adobe_premiere_pro_2021_system_requirements.pdf
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6022e7df5877f.pdf
    • https://taduvovu.weebly.com/uploads/1/3/1/8/131871704/wikaxev.pdf
    • http://nekidifuton.medianewsonline.com/ashokan_farewell_violin_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mepitar.atwebpages.com/candidiasis_oral_lactantes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e012.bin
8c2b6d1fffd7c127f155d42b101d903299194930dccf83528f7cf994a92ee08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 5100 bytes
font_01_sfnt_off0000f18a.bin
ca77e03c952b5f45aac935814b3c08738ea14f728976b50dcfb02dd1d37c98a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 11268 bytes
font_02_sfnt_off00011804.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 16204 bytes

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