Malicious PDF — malware analysis report

Static analysis result for SHA-256 7320e0b74045fdf2…

MALICIOUS

PDF

98.7 KB Created: 2021-07-29 21:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5278677608f1b2ea1dd9d7f4f6341d0e SHA-1: efff096c6c098aa14feca5793deb12d93a9df6d4 SHA-256: 7320e0b74045fdf23eeb208735653390fb427b0f6267c379798ca10651967bd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to numerous URLs, several of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/6ec457f912e8b342a58b983867a4e459/tidozirop.pdf In PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/kerotumolu.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160742d74af689---fedajemunusafepuwo.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/nabenoxevadalivosevowuvuv.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2i2srue78ppvqke5l6le18uqid/jawem.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/b0e7c22954e3d585e7ca1eec2341683c/26894597336.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/sanasoketovanosiwasurala.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/xuperorinowebinoki.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qf0hmiob61dralnsqllcplt7nr/46989429022.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/suwoki.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/bawativapijupikuna.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4050078f11a87eb3c4d49c03504ad239/94574164931.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/b13544a1d09b2fcaacd94e33d56e8145/52991706059.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/kisemidazigebubulinuje.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc12755cbc4---rofovusigepulamibolivaj.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/1390665866.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/bivovas.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/91823404133.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/63537627268.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/67799137192.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/bibux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tabla+de+vacaciones+2021+mexicoPDF 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_off00011a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A84 18624 bytes
SHA-256: 6e4e4b51bf44b5853c5a68d6d23c5e757ffb8934b550758124f6a6d80432f76b
font_01_sfnt_off00014a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A77 10896 bytes
SHA-256: 1a9477695caac25a566bc5e812c0e17715628f0795ae351e19a35d8e4a32613b
font_02_sfnt_off000163b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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