Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c704f10d2a6462…

MALICIOUS

PDF

72.7 KB Created: 2021-10-01 06:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 280c1fb90a800f22a6bafb56850f2c4b SHA-1: 8b200d4cd54a33c913b209c3cbbc31f9c8b92984 SHA-256: a0c704f10d2a6462670f121b3da1c4050dab0bcdaf6d2f8af60553a087f58edb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution, by redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=transfer+app+from+android+to+ios PDF link annotation
    • https://listapp.in/ci/userfiles/files/zedaziteligubeg.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210927163904241581f95h0j.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/bisoje.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae158cc4a4---zawad.pdfIn PDF document text
    • https://edgecs.com/documents/8145313233.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/19532406407.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/47101745413.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/11390719417.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/kipumixup.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/61536200324.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/xebukusexa.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/zizolazozazaru.pdfIn PDF document text
    • https://orrizon.ru/images/file/vekerigopexu.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/kisivojebigodemapoz.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/99607598355.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/89215708797.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/39273734602.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/vereduxafelebakojex.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161533c1a48119---furosivexoginuk.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/71970545620.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/69130406447.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/92363952102.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/17156829018.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/buxoxa.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_off0000b626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB626 18572 bytes
SHA-256: 8164b29cba59e5e53df2474b1a156e31616f7622d3e2296aa2901ad4f7c96963
font_01_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 10576 bytes
SHA-256: 543b25319f73919939642bb9cc88262c03c47d174365b7003095f5eb99957f76
font_02_sfnt_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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