Malicious PDF — malware analysis report

Static analysis result for SHA-256 c180747e6daf468a…

MALICIOUS

PDF

70.2 KB Created: 2021-09-27 10:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 541b73af3a6191cf4acb68a0bce96e22 SHA-1: 919be4f64b9f5a7b59fac61eaa77ceb65761de64 SHA-256: c180747e6daf468a5592351be500211754706d2bf242c0a7fc22bd9d7d44d5aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and numerous external URLs, many of which point to PDF files. The presence of a QR code lure heuristic and the ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggest a phishing campaign. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://infrive.ru/uplcv?utm_term=how+to+scan+qr+code+in+redmi+note+8+pro PDF link annotation
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/22687002394.pdfIn PDF document text
    • https://gtsk.solar-napkollektor.hu/js/ckfinder/userfiles/files/sajasevirim.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/47373317076.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/popetebu.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/lusine.pdfIn PDF document text
    • http://rjt1.org/upload/files/purevanewadejafov.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/51159772921.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/88921110364.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/90753953803.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/dilasi.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/sutamezimek.pdfIn PDF document text
    • http://vpsystem.com/files/fck/masefapurififuwina.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/pejopofugugalur.pdfIn PDF document text
    • http://oilspecchem.com/files/94601059423.pdfIn PDF document text
    • https://servicio-mexico.com/images/file/fifegotoligiwetafumiguros.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/lejemi.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/44687301680.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/kukop.pdfIn PDF document text
    • http://tlznailspa.com/media/files/kujovufawomozigijuk.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/68941089730.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/92671475021.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614a292b235ac---zapuwuxugebunuginidi.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/88353170141.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/835f4d68ab2b4dbd545af3a5c5ee84a9/46329562527.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_off0000b2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 11060 bytes
SHA-256: 84691f48a0068730456adf3f4352b913e6b71623b7f45598672ee8021cc5e2da
font_02_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 15356 bytes
SHA-256: c1de397e068acdf9938d973c16357a044a2be1899a155ff57cece25c3523410f