Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f815e9cb717d185…

MALICIOUS

PDF

73.4 KB Created: 2021-09-20 14:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f02e9016736802e80e33404984345e88 SHA-1: a42269d0bbe99bd79b40b740b1251894603e5258 SHA-256: 4f815e9cb717d1851ef64dc15f0a39021daa9a410eeb11416ea573df88e9c799
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to direct users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6472

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://puzynowska-kancelaria.com/userfiles/file/200683984.pdf In PDF document text
    • http://powerfalcon.net/uppic/files/192005459.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/22519144465.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/65883523450.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/11078464903.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/97449073780.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/90462367405.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/37423872137.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/nikiterike.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/gexogitujifisimafi.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210905_098E64FEEC1212CF.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/96513146445.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/pemazewenebizida.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/vodakamufibadivozo.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/kugavi.pdfIn PDF document text
    • http://popmetre.com/news/files/43267556146.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/o0h6o8hgh3oj1atijolac1anim/bepinola.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/36345772711.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/roxag.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/sizojeburolejameji.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161394dae1b0dc---56214286964.pdfIn PDF document text
    • http://ihdbd.org/upload/files/99603914847.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/12392064740.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/31405950154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=zombie+games+hackedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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