Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee36b374c6874f04…

MALICIOUS

PDF

96.1 KB Created: 2021-09-02 11:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 522c6220274638f59a625ba5c98a46e6 SHA-1: af37e4847da658416d27a1ed6aeb814e3a81568b SHA-256: ee36b374c6874f04b24041466cf1cfcafca8eca8c69f925f9ceca18f478688f7
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://daivupaint.com/img-chamthi/files/xaluvisovulexibex.pdf In PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/78185438323.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/4nkt02va58js5i79tgliakb6p4/95257594907.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/perikoxejupogarojidowizo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612bb19f22aac---58436067253.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/segajinisek.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c87aa76618d---27810764204.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/36327634594.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/95750324476.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22d4da3c43---42729700482.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/55956afaaf91d6071761a00c63cfa584/1831373253.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2e28bf711---venot.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/bixawevowuzanodarurax.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/33726584771.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/95b07aa82892c2c7b912b4f2bb6e8e06/duvitesepibadetowoxusom.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e310c2be---zejozinaladetemisob.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/mjnr0tedgn2f7dr2ll1d90t6le/sibewijerajowiriranid.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/gitorapaf.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/bojenexorifox.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/r98m7g6i5h9419d897a6hirt69/bexexixigotexupek.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16075489f5d9dc---64945640142.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/74387550550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=manual+maestria+reiki+pdfPDF 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_off000110eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12902 10724 bytes
SHA-256: f27e1a956f9acb29aa67772492592ad4d92f2b225b3a2e770fd4fa14079a0358
font_02_sfnt_off00014191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14191 18976 bytes
SHA-256: b04e97c2b6c7ce9152a8f9713941220742dbe7c77a3fc264bebab98f66905238

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