Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef697a1002e6f22c…

MALICIOUS

PDF

62.5 KB Created: 2021-08-30 09:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ac82ffface5751a436f5aadd51bc1258 SHA-1: e3ab30db60154362bfce5ea312b891b90a82ac2d SHA-256: ef697a1002e6f22c421c4811a9dbd20f0f4e8283760de216b524ddbfbf163110
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of PDF_URI and EMBEDDED_URL heuristics further supports its role in redirecting users to external, potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5156

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=for+the+former+and+for+the+latter PDF link annotation
    • https://techson-cctv.com/upload/file/50878935953.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609b121525e27---8070654892.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/79990b387ffa3b998234a40530abfac3/dezakowagawimebomotozagom.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7aae463df8fa84b8c184037c4527ea0d/wasipupagivaxawusevugi.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/gikamemogirabigagigutum.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/tagilidogofusatiguv.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/1b1aaa75081f370caea24e9b45fc74e6/xakixebe.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/30729231627.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a4ec7823c---61300961502.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/bf4adr2q2p9dn0hl21gdvs78q1/mebiwuzapagefa.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee72d5bff---verikobevavitezunuva.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/zemukixofiwixi.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/64085451421.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160853252468f2---21934147802.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/rokimowopovog.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/14115382670.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/zipegodunebudawunitak.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/pojalepiranisejasetoni.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/resolovamesisutoxa.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/larodeladelojoferami.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb8596a94f---71259487245.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160745fd43e723---506729434.pdfIn PDF document text
    • http://ipublicity.cz/data/file/verona.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b6e056d63---vivifesekudu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 10336 bytes
SHA-256: 4e85648fc7ad3f90c7757415e31acd717f4dfcc60eae4c6e016f8da0c9dd9729