Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee32387fde7e659b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 02:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0e7b0fbc6b7fe1bc68cbe949a2a94c6f SHA-1: dc97f49cb56d14fee5f3694d50a90f3fcdd30427 SHA-256: ee32387fde7e659bf5a4215b14c837ea608c6a125b73e538f1dc30d8a0678623
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attack pattern involving directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://horvathortho.hu/tmp/58705049764.pdf In PDF document text
    • http://indianspringhomes.net/userfiles/files/risukojujemesozodunuxes.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/21242733849.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/gasapewogadewuvino.pdfIn PDF document text
    • https://flyags.com/editorResources/file///80974788168.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/rozimebekawixi.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/puladarowelewiwajopakon.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/74050676499.pdfIn PDF document text
    • http://flathead.herosuite.com/userfiles/file/zatesozakopel.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/junolarupik.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/gizukilo.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/feluv.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/fumimurageg.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/37362083558.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/39789503559.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/rodakawekaj.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/76768878780.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/jozinagosurutawezebeku.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109090306329780.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/75331364009.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2a0be0365---77766977815.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/11022855066.pdfIn PDF document text
    • http://uchid.com/uploads/file/1571767548.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/panifirotomide.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/modapaluvulike.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/tididuwepagipobekela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dark+souls+switch+save+editorPDF 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_off0000d2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 17908 bytes
SHA-256: 56e329fed3a6bc6d8b20551994212f8e63a644f7dea04030273b9cff7d62ffa7
font_02_sfnt_off0001198b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198B 10708 bytes
SHA-256: 686c7aa9891f86196541ad35b2cb40ff3238731ffa9a76500e1d5f39448dd614