Malicious PDF — malware analysis report

Static analysis result for SHA-256 a768ee954dcfd64c…

MALICIOUS

PDF

86.7 KB Created: 2021-09-08 09:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 525506de1bd2913c64025c4ee998b4c9 SHA-1: f12506621072a092bf5da057995f57ba482b6d23 SHA-256: a768ee954dcfd64c898105892a821c3be88afc6dfe9194dcd9c40f58ffe5aa24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crysiq.ru/uplcv?utm_term=pencegahan+kanker+serviks+pdf PDF link annotation
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/3d9bb24cf2bbcecb99ab51f2ef4fc9b1/52367412030.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/gimozileloruf.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/gatiligixakigomeg.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ccb5dfda9825cd966610c96a7febad49/92339280843.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/dijema.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/21288708185.pdfIn PDF document text
    • http://derma-dts.de/files/file/dawasirexupaxavigusivusur.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/67278373926.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0f899ef44954d294750b6a5bf070bfa9/weriruledamig.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/a08k335sq0n41srsomv77a8qts/lekoridoxarirexuzivatos.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/9f20fdea0a5976bf17ffb54625efae37/pegelarotumuleti.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/61277179647.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/fefutativure.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/b83f916cc8a17769af821664d8c8b673/zutusuwibadava.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/84ee311a5c069e1ed27b4adbe35a39f9/73050308840.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/17169413249.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/74962540516.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/sowejarebagup.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/84433e767526546198ac901ec32c4cad/fadozatajemamekag.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e723d404e58---pufulukatiluwepu.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/fabesivilipizizediw.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/4949458761258186700e0.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/487b2492a976c4696e0f3fc132a506a1/kilog.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/nui3nurhbb39llf1228ulf0u1v/14938095547.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_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 10792 bytes
SHA-256: eeab80b26ea0b75fa729faeb69725d52e0f31dc3102c30705959385bde46f8d5
font_01_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 18168 bytes
SHA-256: 5c15d487319804c6298f5d52ce5ecdc6a8878ef244b38a09c3b34eceecba1211
font_02_sfnt_off000134ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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