Malicious PDF — malware analysis report

Static analysis result for SHA-256 7128d6205e8ebaf0…

MALICIOUS

PDF

77.6 KB Created: 2021-09-18 23:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7e002feadc0d029d3afa8cb3272f5e83 SHA-1: 6c8f8b48d9fdeb85acbfc96a4f3508b645b65880 SHA-256: 7128d6205e8ebaf0d4c8f3e4b0606f4be56e892cc6e824738d1537543260903c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm designed to obscure malicious links, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the numerous URLs present.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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://mhreng.com/userfiles/file/88070259641.pdf In PDF document text
    • https://pointvirgule.ca/upload/editor/file/sixijurimuvuruxamo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dizuvosifudebe.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/wabux.pdfIn PDF document text
    • https://ptogel2.com/contents/files/61097382100.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/80143765354.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/sokejugagiporajodofigigo.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sopoj.pdfIn PDF document text
    • https://durimawar.com/contents/files/43195344944.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210910111136086.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffbc0379ef---33430638686.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/84838285687.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/23315704729.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/woteponupok.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/59241706892.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/94045996971.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/46150345803.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/gimoxonudoxumemoxerifuzu.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/fujiguse.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/kisagesawotosilojenezate.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/bebikapox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=apk+download+car+gamePDF 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_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 10660 bytes
SHA-256: bbd6db95c4f8711cb297240987abfe5168713466b3d6656b1713e3ab1683a9f9
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 18260 bytes
SHA-256: bfc33aa94f97a044eaae5b6f4fd420cfb3ad7f26fb9d97cb00472a922ac128d6

Open this report in the interactive analyzer, or submit your own file for analysis.