Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b5d4011913cb0a…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 14:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4b77bd9bdf44577d3be7c44873f96af SHA-1: 5d77e61f9cb6fa1bd8462d479272fe60558ae015 SHA-256: a8b5d4011913cb0a10878e809a8399d5e9a1aa96dbc5724bca441709352de98a
104 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. The document body contains text related to 'payment received receipt', aligning with the 'SE_INVOICE_LURE' heuristic. An external URI, 'https://seumenha.ru/wix?keyword=payment+received+receipt', was extracted, suggesting the document's purpose is to direct the user to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=payment+received+receipt
    • http://normal-id.com/goduviwemisupofuvswezp.pdf
    • http://spencermcman.us/the_secret_to_attracting_money_workbdgse3.pdf
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5fdae24d14ce3.pdf
    • http://rofuxipof.mywebcommunity.org/bupikovifopi.pdf
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5ff27db0a7a5a.pdf
    • http://lafilubepojev.scienceontheweb.net/basics_of_computer_graphics.pdf
    • https://static.s123-cdn-static.com/uploads/4375907/normal_600897557dffb.pdf
    • http://xajavawinereko.mywebcommunity.org/99523366079.pdf
    • https://cdn-cms.f-static.net/uploads/4370089/normal_6035453196d3c.pdf
    • http://bixaxivajujojar.mypressonline.com/pixilovifakedu.pdf
    • http://brightshopbg.xyz/how_fast_does_the_e200_razor_scooter_gomxxei.pdf
    • https://cdn-cms.f-static.net/uploads/4487626/normal_600fcad3daaea.pdf
    • http://coupons2020.info/blackstar_id_core_20_v2_reviewda0xv.pdf
    • http://tryraisins.club/warufakawegupupe8dav2.pdf
    • http://lowusonuraku.mygamesonline.org/40649941424.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/22843e03-fd7d-47b8-8581-0a76870e1d9a/vojibodiwudaroxe.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_cbbfd68a27144c8799d0a97380d81178.pdf?index=true
    • http://wutesejib.onlinewebshop.net/lomizuluruwabaxinis.pdf
    • https://uploads.strikinglycdn.com/files/7c3a82d6-6f73-4420-8fb9-6b9245071699/how_to_change_the_time_on_a_toshiba_office_phone.pdf
    • http://seroritubofa.atwebpages.com/metode_pelingkupan_dalam_amdal.pdf
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_cc425239ab904fcfa750f04bf543696e.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_off0000fa2c.bin
e216472ae5a4f15abc67155b08c7f979438b322a2a6053ef0d2dc233570338ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 5172 bytes
font_01_sfnt_off00010bc1.bin
46a1ad7b97b7627295d5eebd2daba5045c615ff4ac113eeb9f51762abc7911b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 11280 bytes

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