Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eade4dd023b4fb2…

MALICIOUS

PDF

86.0 KB Created: 2021-09-13 09:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6236d53fd18fbb227a5f755939f3ff9f SHA-1: 0fa3e7b13fe1b10bda8ea3f3334584cdef766bba SHA-256: 0eade4dd023b4fb2bcccf7fc878d41f39af243f14c790ddcdf0f5ec812ca744a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

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 http://marcelponjee.nl/ponjeefiles/file/zavilupalibolipo.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eafc40f5e8---55902395117.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/witifenopadobebu.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/1309026072.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/24052063761.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109071817596404.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/jerem.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/56811287626.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/pumopebobeg.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161378c5198c4f---37037016773.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/30972924162.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/fukabiwotopejeruguj.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/kagibe.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/vodebofefeganinajit.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/17100141698.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/640b9724ba27d539113607fcc42a514d/48355070523.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/pejilerutodurevakeba.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/pujepolimifimaxatasubuxu.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/85805572262.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136895adde7e---fivob.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e29a3e0535a0c6ef141c889c1df10b1d/54771989212.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/fabizepomilanazur.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae8b8d8c7e---wirevunixosogerelebosolo.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/zunixuvowupex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=android+camera+filter+githubPDF 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_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 19320 bytes
SHA-256: 94787c97b3a88f32800a2fc125e5e4dec73c4e911a55a8edcf2bfb6bff12a908
font_01_sfnt_off00011901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13118 10976 bytes
SHA-256: c68845f1721602adaa19bdf39aae9c3f440ffbdc7f93558bc621259e64681cd1

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