Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e3e2f7345143ad…

MALICIOUS

PDF

73.1 KB Created: 2021-09-17 20:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2dccc5a718698ae2f2aefed4b08b538a SHA-1: ec3d6711ab90bf9b47aaaa71171992d9b9598790 SHA-256: 56e3e2f7345143ad794b6d65ffdb5f09ccf343cf6da164ca5092393a3dccfcfe
154 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The ClamAV detection and ML classifier further support its malicious nature. The primary attack vector appears to be a phishing attempt via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

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://spacio.hk/attachment/file/51626882627.pdf In PDF document text
    • https://producedepot.us/userfiles/files/rugap.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161438c4142f16---28286140024.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/bejinogi.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/lulubirefuvonikisudavevo.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/35842012432.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/41159986460.pdfIn PDF document text
    • https://birotex.rs/images/files/79810024816.pdfIn PDF document text
    • https://kaimano.it/file/63317799189.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/fovoxilowupiwavufiw.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/tadinuk.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/dezotiredevix.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5037240a76b632fb6ff07f67d1c80bb7/54560472211.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210904231227.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41883420662.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/lejofisilidulo.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/61895132207.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/74259682630.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/14980859010.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/tominezes.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/90057650052.pdfIn PDF document text
    • http://renknh.com/ckupload/files/visewaxipixidunazurupiza.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613034ba01167---24950834409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+lightsail+vpn+apkPDF link annotation
    • 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_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 10684 bytes
SHA-256: 8c2e1e6a2bceab28ed63c998eafb3aef9b057c13ea360839fa49401b800e5775
font_01_sfnt_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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