Malicious PDF — malware analysis report

Static analysis result for SHA-256 022555f2d5d32520…

MALICIOUS

PDF

62.7 KB Created: 2021-06-22 14:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 60355f7145afe3c62ef27055c254eeb0 SHA-1: e8c867ff79dacc66ba6df2e29406760b71cbd29b SHA-256: 022555f2d5d325207971df3668794493820c080fe67807e763aaaa892a570fde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links and the 'PDF_URI' heuristic suggest the document's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9672

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://wastran.ru/uplcv?utm_term=waking+the+tiger+pdf PDF link annotation
    • https://citytrafik.nu/images/file/kared.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08a065db8---48980852971.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9f2389c1d947785c3052cfacca6025e8/womilulotafuvatipeg.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210509140911.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/83860805589.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7b8ddac87---97541348764.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/vedogazubadam.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/742901761f6936f35d2d805976fb8b50/6991960085.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3856d5210b4d21e2c902f61a6c87ab07/16982962753.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ucol1ipc75i5ca39v3rmsn0mp6/lutefejabel.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/dddbed604797fcfd6a355dcbe05d0a77/56957472653.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97d2e4e07c---bobiduwibisebin.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbbdcbf92c---nareguzazolulalotib.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/088b86971581a8207d7d794fe7809142/fonakokol.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/topiruma.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8546ea1a9a---monogawe.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9e89d290---86866308879.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/4be6b57334c3f89fc13015269ebb4d29/79908674603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC795 4848 bytes
SHA-256: 5b39c4d64b7d9bdffa400f5addae97caf7dced1d32c8eeb58e4d2d81be2c6e52
font_01_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 10696 bytes
SHA-256: 610a27d44b54010a7a2e3546351e841adc96785fc320dbbcdea7706bd6b9c162

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