Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c95d2136101fbfc…

MALICIOUS

PDF

81.3 KB Created: 2021-08-30 18:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a6b1710783cb3abef652b4d8455e62f SHA-1: 876c78cf9ab9eec46d8a6beec0c81473c18952db SHA-256: 3c95d2136101fbfc3b7599c3c05ac0d444d8e0f3cd28b9a21c98d9346ce202b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to numerous compromised websites, many of which appear to be hosted on disposable domains or utilize CMS upload vulnerabilities. The primary goal seems to be to lure users to these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://fandimnarodaku.cz/upload/file/setojigolawiguzo.pdf In PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/ronubexupovoviwifew.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/rusipadafunivegas.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/raxugibuvejafuv.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/miranifavobovuz.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b5b002dcefd3891b99c0c70663cfbdc/62167820127.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/69126582626.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210809195542.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/icepcbq1rdqgubjg1seh7ritkl/vesobavolupe.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/b192dac1551d3fc10c33475f9819d159/mulunujepupobe.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/tozefoduxotu.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/71920334484.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/tim81de9g29mm2jpnah8kagf80/lubuvepopusukasosajegirok.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/parixuzadu.pdfIn PDF document text
    • http://slsnn.ru/content/files/99115903579.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/jqvgq5f26kretnj23moc2ejan7/64327334769.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/tideperepajade.pdfIn PDF document text
    • https://kalnapilis.lt/kalnapilis/web/web/ckfinder/userfiles/files/wiwijepidadig.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/62079905444.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f027611695---jaduzoxazi.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c7a09653016888e907e4cc06a699f3f0/fikixo.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/44c4bd89f047634d767caf90e76351cc/36804313817.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/sbd88h1qtjrbchrpl0rnuqp6nk/xeleputejuxoma.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d8a894e79---69945742434.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=iron+and+copperPDF link annotation
    • 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_off0000dac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 17568 bytes
SHA-256: f9a3aacff8ad346e1409b82d5ea93560ceed5c66bbecafb6bec197677cdb2903
font_01_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 10052 bytes
SHA-256: 3d20ae7ca877b20d93e4543cca0ee82d8a022557e7ed805acbe2441221307318
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1