Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a39c88ff7e6fc5…

MALICIOUS

PDF

74.8 KB Created: 2021-09-06 19:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 09c598302a5a3b3e9847423abb15e55b SHA-1: acb8b4fa6037333ddf728d526bbf6b0d13eb2f83 SHA-256: 39a39c88ff7e6fc59964c985cde047ab34206ba0d98acca53fe5dbee76136222
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/198055590e5ae8ae9298a971571c0ee1/wobigufukorib.pdf In PDF document text
    • http://cx-gl.hu/images/files/juvuxopiz.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160943a42d459c---58195659319.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/a216d9a3ed080b6a86f451c6f45a3598/subanapuxupaxuzisaxuza.pdfIn PDF document text
    • https://toocapen.com/files/molaxelanol.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/rafibapif.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083272ee0ce3---5404438280.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608710e35472b---ziwukejoxu.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/jarajudafixi.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/dekiserekexanuko.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/jebojima.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/sagogovisuj.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608db04498d57---91383564502.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c13d0e62d---mexopusa.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/21620764171.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/38247839360a1d40491001.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babae8ed894---dasulonebevirawepewizi.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/dudobatonali.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/vavememavegisesomutakogil.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210714034836.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/94404361482.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/pawomupetimafapenomu.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/virefufomosadamovajamo.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/wivutofekarunutapaxosozu.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/kotezikex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=manual+de+usuario+samsung+galaxy+s8PDF 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_off0000d681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD681 18636 bytes
SHA-256: 28550571830ec2a4526754dea90d33e0b8944896dd4438b6ec3d1c137c864369
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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