Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89e069dfe1a4744…

MALICIOUS

PDF

77.9 KB Created: 2021-09-17 06:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e5853210b9ba05a2062454735d170159 SHA-1: df8356a1f5df0d4c01a11c2f8dba37f2947b3026 SHA-256: d89e069dfe1a474470db76233ede01c6367adad680b68163ffdccb58c75b022a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The presence of an embedded JavaScript stream (T1059.007) suggests the execution of malicious code within the PDF. Additionally, numerous external URIs were found, with one identified as a link farm on disposable hosting, indicating a potential phishing or redirection attempt (T1566.001).

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
  • 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 http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed836787cb---nopidulogubo.pdf In PDF document text
    • https://burlingame.com/wysiwygfiles/file/korodo.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/ropukitowalezinajufone.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/84124162118.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343eaeab782---navatexorigojosevod.pdfIn PDF document text
    • http://vhshf.de/File/29321702509.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/takudaruzejomu.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/52258398476.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/wufawuzedejim.pdfIn PDF document text
    • https://jurad.eu/files/file/47049695494.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/2162415310.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/5978562044.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/54158990190.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///7466206912.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/suximevekigomamezugigefa.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26032966494.pdfIn PDF document text
    • http://licausi.it/userfiles/files/5794015661.pdfIn PDF document text
    • https://khanikango.in/file/71614483461.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/35119775417.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/43971036397.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/23369195841.pdfIn PDF document text
    • https://jagominum.com/contents/files/36201949132.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/72666204648.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/14100910575.pdfIn PDF document text
    • https://penal-garazh.ru/files/1759715452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=puffin+browser+premiumPDF 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_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 19644 bytes
SHA-256: 7b61c22798b60f14ec7eb39bd6081e3a2ca9d328361efa19de38cddb9c34d3ce
font_01_sfnt_off0000fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 10540 bytes
SHA-256: 207eddb97b96a4e665144850ec1f99c048bf7808110009ce300755f140c40aed
font_02_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1