Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47bbdaa9d16d942…

MALICIOUS

PDF

142.2 KB Created: 2021-06-27 15:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f949d7c6404e3ca6dfd49bd5e8e02786 SHA-1: 9522f7808444099c5a5291c425b6f88ae86ec6f7 SHA-256: f47bbdaa9d16d9420b03dad1dcfd59bc71e5e3c7d11d835d9c82c5659130cac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9775

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
  • 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 https://coretry.ru/uplcv?utm_term=i+just+wanna+live+your+love+tonight
    • http://allaboutdowney.com/userimages/20792550284.pdf
    • http://axwelindia.com/uploads/72476783702.pdf
    • http://giaodantanthaison.com/Images_upload/files/58974071786.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160795572520da---85790757129.pdf
    • http://cnex.cc/images/blog//file/85509631240.pdf
    • https://abugfreemind.com/userfiles/file/datezilufalon.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a772f8602b---xeforewogewit.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b871dbbab7bd8f92349d2d830678ba36/58221069667.pdf
    • https://tramhuonghanoi.vn/upload/files/29720823380.pdf
    • http://evohome.pl/userfiles/file/84064589915.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805d69517a8---31065658500.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e257ca63---63034050649.pdf
    • http://optikametuje.cz/userfiles/file/7110947579.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608462f9ef2ed---dozurefujojobibu.pdf
    • http://fouladsazanco.com/Upload/file/mifabuzokujetow.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5ff616bb4---logusomug.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850a98ba868---44841419720.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/zawik.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e03fb2942---58369102564.pdf
    • https://obermeyer-modemarkt.de/upload/file/bigavudilemexogala.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/3062221685.pdf
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/46938884979.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af89dcb1936---75038887225.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faa03f3fba---gobuwofiwigivob.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8203a994bbedb41c121091aadb315c2d/barevasupeliki.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed3.bin
83d0b20980521bd7b159d12b9f13022463f916b77143173e95685376d3c7cd3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 16568 bytes
font_01_sfnt_off000119e5.bin
f0c60f9def9f166b43bfffa42435751723a45cd10f1bc52a3f87d70ed42783f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 89140 bytes
font_02_sfnt_off0001f838.bin
007e2d5f05e63b59ab7ae5e4d2518eb0de7e794adc7f964c19da5beaa463d34f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F838 10832 bytes
font_03_sfnt_off00021132.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21132 16792 bytes