Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9cd071739a23b3…

MALICIOUS

PDF

71.8 KB Created: 2021-09-12 18:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 48460c1780228461a2ba3a93eee369b4 SHA-1: ab211446213825187aff4af3cb7055ec5b17566f SHA-256: 8e9cd071739a23b394407cd662db6be00c3c674810d0fd6011ac629f1ac6f1b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://smidgel.ru/uplcv?utm_term=kimetsu+no+yaiba+movie+mugen+train+watch PDF link annotation
    • https://bjjewels.net/nbloom/fckuploads/file/78485637587.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/1e9176a7f7f3385bd083666005855a41/ruxudafubatojo.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/75707399854.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/59498992555.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210906_205102.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/tejebilitabajikubi.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/66673534355.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/16723983342.pdfIn PDF document text
    • http://pi-consulting.ch/download/9013343127.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/jumosorapa.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/fumav.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf33578035---fizajevafabosovikug.pdfIn PDF document text
    • http://halaljones.com/uploads/files/18678888757.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210905032018.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/38600318586.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/33693031385.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/wepixorurefurokizikaw.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/vixetab.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/fukijumobewum.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/zotojijo.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/36857288245.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/8630575591.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB451 16780 bytes
SHA-256: d6fb4f0def429b3784f6ea0081e61bd4e48196054d52ac7e1c63a6cdad5e3f92
font_01_sfnt_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 11128 bytes
SHA-256: 23fe4344a5cd7bcdfa69d71ab068edafc33af807ec62566cfd7352f08a2fea73

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