Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8706e8d61fbdc0c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 11:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a4178d182dd0d69d486c68fdf919bd0 SHA-1: a2b69098e1cf08e17c492496d887e3a026ec9adc SHA-256: f8706e8d61fbdc0c86d3603bb4f05a1d0995d187e6486d9a0299c88c097a12ae
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically advertising a "v bucks gift generator" to entice users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the presence of numerous links suggests a link farm or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://garglob.ru/uplcv?utm_term=v+bucks+gift+generator PDF link annotation
    • http://dulichtantai.com/files/uploaded/files/rokodinebojuzuke.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/rufurizizukujuzimapejudet.pdfIn PDF document text
    • http://premo.at/userfiles/file/gepiwuluxobutanasalakiv.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/97400195882.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/dazugazipelulov.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/37814574009.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/nibimuwijomitopup.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/47258063170.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/52070695670.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/liviwinim.pdfIn PDF document text
    • https://nyig.com/files/file/43065243478.pdfIn PDF document text
    • https://penzion-palice.cz/content/naletarudusafupatu.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/jutim.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/gadefegim.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366a937777d---22862807997.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/66426552150.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/juvafanet.pdfIn PDF document text
    • http://osayit.com/images/file/65902935082.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/rixiwa.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/xupuxevovige.pdfIn PDF document text
    • http://xycrusher.com/d/files/88742790305.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/wojubixazewixutuvuwipe.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_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 18396 bytes
SHA-256: d82e9b956fca7368641b900f8c7daaaddeca1356c8f66485b333c07f206e8b2f
font_01_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 10764 bytes
SHA-256: 15835e5fa593d083d0d1631f8fda03ce0029734c5d0ddd4dacbfa13ef70b0207

Open this report in the interactive analyzer, or submit your own file for analysis.