Malicious PDF — malware analysis report

Static analysis result for SHA-256 62518e6e458c7a22…

MALICIOUS

PDF

76.8 KB Created: 2021-09-18 14:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe0f66a0a048258d4381a6606645390c SHA-1: 071497a3db1f958e80857a67bf2eed0a22927d4f SHA-256: 62518e6e458c7a22fee60e4f626607532b72fd7766122e52e1f7f52ec1c1df55
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=sim+card+notifier PDF link annotation
    • http://crisismobile.com/ckfinder/userfiles/files/worepe.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/86360592675.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/75055532255.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161353fded0d86---velapibekukusi.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/44736345364.pdfIn PDF document text
    • http://hevolta.com/upload/file/56596945765.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/pikeridibi.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/48564357759.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/64959054772.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/fuxirosoxotafetovepuwefo.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/lolup.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/valadomuzab.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/81590479984.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210918115233.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/81114714062.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/jebisisapimo.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210903_B1C8BFE1ADB77ACD.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/zuzetixasalulir.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/35677500462.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/58818204136.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/kuxasokipuralus.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/670283c809bb6e4d893c835eb0cda035/megajamur.pdfIn PDF document text
    • https://totounited.com/contents/files/loxok.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_off0000ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 17140 bytes
SHA-256: 50693e026dc910be16288e740d9609ddb4c7c5dfb921684220a1bf7c66b9b493
font_02_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10500 bytes
SHA-256: 5c3f11cb25523c3f5588ab273eb38763565c2f546c886acc455f597b04433501

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