Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fa3aa962a130c1…

MALICIOUS

PDF

75.1 KB Created: 2021-07-24 13:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 592ae2c436f29bcb0ba799dff08ce1b5 SHA-1: 26cc6d2773857f5df235ec0307c44bd7310b2560 SHA-256: 20fa3aa962a130c1e71884247cee5092ab13dc704b4f077f4d06963616381823
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to lure users into executing further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5003

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://grandplaza.bg/uploads/assets/file/12862422508.pdf
    • http://airconbank.com/upload/fckeditor/file/negebupisaniva.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d657dbdc4---lutuzizojametikexiniguvu.pdf
    • http://hodori247.com/uploads/files/rigofapapalipikoviwa.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e8167dda7be---84738562646.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b02448f38a---94427939363.pdf
    • https://webmenuplus.com/images/file/pisojekuvosumuxopun.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/emo9r311krj2mm33u4a2aph2gi/97855256290.pdf
    • http://gleneaglehoa.org/images/file/544950724.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a1239edf1dbec0567d5742721c343691/27675290620.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbb1b4ae3---27088165256.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/27f23afdec94666271bbb58d9b9d9420/nuxagekowetikekejopuz.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/dcbaa4aeef620a64396fc8591afd7be3/jabibeniwovemovaranonuwa.pdf
    • https://iwnta.com/userfiles/file/torifonopubivazigele.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/1686cd316d435140d12d5c4ddc2dd4f2/28998109596.pdf
    • http://originalcheck.it/public/img_admin/file///vutazopa.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/la9ifuqacqlh42tqnafqm28v15/gaxopij.pdf
    • http://galgalesh.com/userfiles/file/sisusojakejixegot.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43bb56e16---somajona.pdf
    • http://cornucopiafrederick.com/uploads/files/vuvanadit.pdf
    • http://citra.cl/userfiles/file/fodomapumuw.pdf
    • https://sgotomotiv.org/upload/files/wemasisewejoxavorakoruf.pdf
    • https://doublehair.center/upload/ckfinder/files/solemokirin.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caebf47f437---barebilujemibuzuwuxufa.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/6jk3h6gob78itrt5htiajeeh65/5490864750.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/6034843957.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+connect+panasonic+surround+sound+to+tv
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 16792 bytes

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