Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcd64449e95a7d1…

MALICIOUS

PDF

86.8 KB Created: 2021-09-04 11:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a35d42761efcf2abb86a528870b1eccd SHA-1: e5e9b4923c05e90ff244eee0ac6f0c6e11465d29 SHA-256: ebcd64449e95a7d1178f93fff45210aa2f6649508b70a64c86d2d34b91a2cc3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous compromised websites, including WordPress upload directories, likely to host phishing pages or download further malware. The presence of external URIs and a link farm on disposable hosting further supports its role as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=akm+winding+temperature+indicator+manual PDF link annotation
    • http://vetranhtuong.info/luutru/files/47974598195.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad883e46bb3---mimidunuwuwawizak.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/57694965078.pdfIn PDF document text
    • https://ovalpolycoats.com/media/xisupokipijagiromadi.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1de6ead8938af1cd6884e859ea5f0f32/77679129115.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/40228893741.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/72f5a5100a7c43081b7f7870873fe45f/46828846376.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///nevobekexebozutojad.pdfIn PDF document text
    • http://haitrungkim.vn/uploads/userfiles/file/gifezonikalupopulonemaru.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d768c719e2dcc01088c46eef5ff3b5e4/94166657208.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/mich4vk7gb67imqh8jedsgqai4/lemarofobogezowutar.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/c64ade164c83a7689673eb0ab4fc714a/ripemitog.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d6e0a9be6---82075504003.pdfIn PDF document text
    • http://dnepropress.net/files/file/10702602566.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/8584db6893ff2c0e371a98eebe0c6786/ganadekujebiz.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/gawexafinefatisugu.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/5371378494.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/82862716752.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/tq7mq9e2h7rgu398oibh8eioc6/denejevokutomuranatu.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/zejajaje.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/aede38ce40464928d218e811d7b0e29b/47762486949.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7fc1210664d6b09805365a3ba9002732/masaxakes.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/79394143846.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611ebeb66ede4---75520905672.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c183551a33f---88658590479.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 19624 bytes
SHA-256: cea3e8dbb138490eec60952b40f560077e0830058fc348d664a36d906a64e2e6
font_01_sfnt_off00011c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 10948 bytes
SHA-256: 98b9a2682bdc99f277dd6c2d24282f1e52c94dbc139383afda1962ddbe3643a8

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