Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c8142e89332868…

MALICIOUS

PDF

91.5 KB Created: 2021-09-20 16:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 72775ecf1753525a06eb332b9d14d01e SHA-1: 596674d403b0be889a850e883c42fdc89771cdb4 SHA-256: 96c8142e89332868b19a4f2ef9bcef7869cfff19df9c6c869fa15b9fd58897d5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites hosting other PDF files. The ClamAV detection 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution campaign. The document body is unreadable binary data, suggesting it's not intended for direct user interaction but rather to host links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2625

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://crysiq.ru/uplcv?utm_term=which+country+is+the+third+largest+population+in+the+world PDF link annotation
    • https://hamayeshniroo.com/shop/file/72758062644.pdfIn PDF document text
    • https://primer-spb.ru/files/files/sopotogototalufusulit.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/1a4edef59c7eefa8fc6f754877e49f75/30459379074.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b93008fd968cc4f73d3be823b31d5cdc/87703765764.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/dekafojubufadisibenobulu.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/48678debbccc3074415cd1dcef344c64/91380389013.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614072429d8a6---kugawaguj.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/50836197554.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/39450534260.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/74058526244.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/jinugirisov.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/sanego.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/dixolafubixixikuxe.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7d759dce5f40257d96773d5237e2d617/natulovoduto.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/5398b447c8bb7157c1d4d335cf243437/50556156874.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/64217699192.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/65711756763.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/zabujido.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/75147948589.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/87817393299.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/14508033316.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/56259626903.pdfIn PDF document text
    • http://abpaluso.com/upload/file/mopotugikaf.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/87867174241.pdfIn PDF document text
    • https://ikomsolutions.com/admin/userfiles/file/xumadanajufuso.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_off0001121c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 18964 bytes
SHA-256: 84f6d77fc89736922fa5adc7dadd2c04339083ad40663688ce0f8d2faa7f22b8

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