Malicious PDF — malware analysis report

Static analysis result for SHA-256 2072d0e4f37c0b60…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 18:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aa5ff2d66731f4b38532074817cc2b0b SHA-1: b1474ddbcf4eb381262664613a80cf305d14faf0 SHA-256: 2072d0e4f37c0b60a13e73e2b7f7473da0d06cb637b0ef6c92da7bb1cc573dfd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs, many pointing to potentially disposable domains, suggests a link farm or phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://artgallery.devctn.com/ckfinder/userfiles/files/45974398266.pdf In PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/tazawewujenanejex.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/giresefeteb.pdfIn PDF document text
    • http://benly-carson.com/product/files/57569707199.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/7714017942.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/88403056347.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/lijedoxaz.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/61610177438.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/343002624613a612e8bc31.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/99891266118.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/18290218350.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/lokasudapodigamiwojeke.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bilimajizi.pdfIn PDF document text
    • http://mamitobe.ru/files/file/26446242369.pdfIn PDF document text
    • http://gapp.fr/medias/files/wukotipebixekaxud.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/19307696392.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/saxigew.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/96369797778.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/samajaluzer.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/92216409569.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/puwevitef.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613116283d1e4---46434329584.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/74764821159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=phone+india+reviewsPDF 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_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 10356 bytes
SHA-256: 17db0dd6b22f0929b3350bb24f7b0b033021c17c2b7f7dcf9e076aa9b722d1f9
font_01_sfnt_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 18012 bytes
SHA-256: b11d5ee06b9d078791b6db2316d54dde56682d35df3b828160bd2e96b556170e
font_02_sfnt_off00012023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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