Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeba98bba9efdb7…

MALICIOUS

PDF

99.1 KB Created: 2021-06-30 02:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf8e155d047a395e57d77df2c9886e42 SHA-1: 1915df8bdeb8e02b850666fc4d2609b59fdb4783 SHA-256: bbeba98bba9efdb74cda14c62574de43dfd3b416bc6441f6ae7210e996a7e383
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa26ab0b7e---42276035313.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b56aa8aa28---12477425653.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/metuzunozanazorabawa.pdf
    • https://usssecuritate.ro/userfiles/file/mutugorumotip.pdf
    • http://ipublicity.cz/data/file/7864633333.pdf
    • http://sadiqandsons.com/userfiles/files/finila.pdf
    • https://ozmutludokum.com/userfiles/file/bemadaxasoda.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609800c80f079---16192578243.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0287b0b97b---kawijupelawoxabar.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb66d67babb---48960999706.pdf
    • https://oklasik.com/ckfinder/userfiles/files/rosizezotuso.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/e893b4gpeitmsqml87ugn8enov/9550106726.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20f6420fb---pisiwa.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/775a4b1bc43599bae6f726119c08387f/40147249711.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16083bdb841ef2---44271371869.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/82854248a2df7b8173f6711f45bae22e/60620824348.pdf
    • https://bharatbiodiesel.com/userfiles/file/72435052752.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ce678dc7d5c---jabufugarafaxilofidofivu.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be12d400e9f---vowowalivamanosozapewir.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b49507743ca---lagimegudipewabov.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61026ee44---425263984.pdf
    • https://tselectromechanical.com/uploads/CKfiles/files/dutupimazotirew.pdf
    • http://ac-kenigsberg.ru/files/file/rixikolerojavavatubejom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=on+site+wastewater+treatment+systems+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012175.bin
ec4c149ed82264df8059e370c1e021ba3a1562cd1effcab27db521ee450d0f05
pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 10472 bytes
font_01_sfnt_off00013968.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13968 16792 bytes
font_02_sfnt_off0001517a.bin
98e5b51f14b39781824591d2a12ff76a49304e929e19d2d1a50942998a719a42
pdf-font-stream PDF embedded font (sfnt) at offset 0x1517A 16960 bytes