Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceba6972e102b2c7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 11:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d305a559f6e096a94c79999ba74c9c07 SHA-1: a38a2cf57bda9bab8157399faab571b73eada5a8 SHA-256: ceba6972e102b2c78e7e20e70ff45cc89b0b2e0a4636eb800e56262f58e26f74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs indicate an attempt to trick users into downloading further malware, likely through a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://binarbaidrealestate.com/public_html/userfiles/file/28098670666.pdf In PDF document text
    • http://slstudio.it/userfiles/files/xenewebuwapajume.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614804746aeae---mivozarafoweriragawupuxu.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/9577436375.pdfIn PDF document text
    • https://slotsonline.ro/app/webroot/files/userfiles/files/sefotububurutitiloduvobu.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dbec2df15---4734396196.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/kajupeka.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/33464151145.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/72240747831.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/20732796410.pdfIn PDF document text
    • http://dogable.de/userfiles/file/fupabor.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16148302cdbc0f---remewemimorofevifug.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/80729432898.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/xuxugodisotejuwan.pdfIn PDF document text
    • http://nineslash.com/user_file/file/tobewanazemepopu.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/9470531571.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/nosutefavivu.pdfIn PDF document text
    • https://teamcode.net/upload/files/16676610483.pdfIn PDF document text
    • http://tzsunup.com/upload/pakov.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/76301401302.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20219141423143606.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/3e4968ed38ccc045f8d805fa8caaa2ed/gojujiwasisuvigi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1896501953c5b9d1a58227c914701e8b/40091065605.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/34891555465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=gameplay+store+downloadPDF 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_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 10700 bytes
SHA-256: 4489ae5a67f59a8ec9924a173b6fd4b41d1166fe3a10c1d7ef4b3acd4bed6902
font_02_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 17216 bytes
SHA-256: bcc017eef00f1169b310def8bfe5c17604e1913cbc2f9a30e2a6855396e99f08