Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc9426aa51ec1ea…

MALICIOUS

PDF

71.9 KB Created: 2021-09-23 01:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44b4fd988af7c44b14399d9ea0f48f53 SHA-1: 7743b1df20f6e087de9fc68ac297f0eb9b6d7df3 SHA-256: fcc9426aa51ec1ea1b976f2beb0bda09ee13ce7f3e082b8bbcc5d79c35edf0f9
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.sherpachristain.org.np/ckfinder/userfiles/files/98511153561.pdf In PDF document text
    • http://lammermoor.net/imagenes/file/lezobegimidujuruzides.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/jotimekumozotadututusu.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/72172893051.pdfIn PDF document text
    • https://ip-pharma.net/data/files/liroto.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/13933663664.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/pidada.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/46197895827.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/powulumipukojalume.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/jadibatozejimofug.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/82096847905.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/jirosawogibiji.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/wobed.pdfIn PDF document text
    • http://aurangabadptti.com/ckeditor/ckfinder/userfiles/files/25583602708.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/ganazejitaguj.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/89977228609.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/6350826508.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/48811240091.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/fofeduwex.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/nexupugetajatifamil.pdfIn PDF document text
    • http://elitacasa.it/images/file/jusuloju.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/fijedud.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311472ceb85---48698917692.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/memotupuzedaweruso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=engineering+mode+apkPDF link annotation
    • https://easyown.ddproperty.com/datas/files/89878098731.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_off0000b63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE50 17284 bytes
SHA-256: 2a4f84288a1726eef836776891813ad65f6810da43af01fdb4dca000b2f369b6
font_02_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 10500 bytes
SHA-256: fe7847031784d2a73ad3b7981ff31b2afdcaf07fec2a0f18bad87f0195580c1a