Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce49fee9a92f6226…

MALICIOUS

PDF

71.7 KB Created: 2021-10-04 00:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1cab7d766af016c0e194e9b0a77263eb SHA-1: 3dab4721ff1eee63317992ae9937e121533d16b8 SHA-256: ce49fee9a92f6226e28dcb70ebe7c793b7983b1f2aead6fa2eb527b686ce847f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=phase+4+marvel+movies+in+order PDF link annotation
    • https://kisikana.hr/UserFiles/files/bebeme.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/86694195298.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/redibisoxaf.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/bujapuzesiloxari.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef88e499b4---35131845278.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/guget.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/45141219577.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/kilegeruratik.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/54917237404.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/11073688612.pdfIn PDF document text
    • http://contua.org/userfiles/file/xowofe.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-19-07-46-57-94.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/zebarezonesezebik.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/riremaxolusi.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/56903547115.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/49622373875.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/gugomelagevagekadugig.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/nesidisejozevopatafa.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/61100746685.pdfIn PDF document text
    • https://mavibusiness.it/file/55420223704.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/lifotesopudas.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16158a04403dca---muxeruweg.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/jonalezojetedu.pdfIn PDF document text
    • http://benly-carson.com/product/files/xibunufudarapidos.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/suxuvipilufitexeteg.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/54000593299.pdfIn PDF document text
    • 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_off0000b39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 17960 bytes
SHA-256: ecb4f0ab13cd985cdd590232a290f070753eb0b1c01fe919f999b88ce6a1a24f
font_02_sfnt_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 10560 bytes
SHA-256: 312c382fcc41fea5f7a247d70482d912964a712e50391162710ad77bbf984a4d