Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bce0b90fb36640f…

MALICIOUS

PDF

72.2 KB Created: 2021-09-02 10:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: de5676ff634b067a2d037dfd5e4d62b1 SHA-1: f4ab10d3d3d0c314481aebbc7346f9645488c723 SHA-256: 2bce0b90fb36640ffc5f4bdcc0b39158d9b9898bc696f6e26832a8b692de6851
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely designed to trick users into clicking on embedded links. The heuristics indicate it's an image-based document with an action trigger, typical of phishing attempts. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content. No scripts were extracted, but the document's structure and embedded links strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 72 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/92099c9db0bffbfb404f06f1114bd30f/68290274175.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dd099d79---mizofin.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/petonomupulit.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c2a408f71541a89f2a65c5039a40b7da/13736841550.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/galozobosadowumexivub.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd1827af2ddfe9844fa8a8b81f5b3d82/97286744140.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/xorop.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/67738609665.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/44224234084.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/zerufokulagiroguzu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/topuvoverid.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6d40e6b9---66969634808.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/7599917368.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/72340823111.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/gejaza.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2103c981252a29bf54bcd442409c206/meluvajexalixufunufajiwo.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e62a902f4---62228122242.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c67514ca9a7---17404716545.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/59225260673.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acb3dd2f84b---latazapedovelojive.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22c656e495---vizugezakasaxale.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/81115223552.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/zepugatexig.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609127ddd0081---jojisiwarusobikom.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ddaff9c2d722948ffc7ef8fbe2235ed2/60627701666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+you+measure+relative+humidityPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 14240 bytes
SHA-256: dad191ba872099300e42418e85bd2efee0111092149c0c086731955f44742aa7
font_02_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 10768 bytes
SHA-256: 8624281d19cd9f317364091c29a4a37dfa43a8df9ee1feab7fd32d64fdff8979

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