Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd72bae785ec721e…

MALICIOUS

PDF

75.6 KB Created: 2021-10-06 15:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f7f2b2cf180719760ba707bcc3151e52 SHA-1: 3d824a4ec9af6067637e93eedd77715c7a6b6f4a SHA-256: dd72bae785ec721ec94d8235254e38a82c001b02633eefc74e9be1713f563a92
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in exploiting PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://chcial.ru/uplcv?utm_term=tv+guide+sports+uk PDF link annotation
    • http://checopharma.com/upload/files/82231984537.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/jolexelugijajikebefu.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/nemodasuzigaz.pdfIn PDF document text
    • https://labelmarket.pl/data/file/83447998110.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/lanakanuwa.pdfIn PDF document text
    • https://adikkedua.com/contents/files/242711611.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/94274513841.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/ribiwajid.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/94176244942.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/391793518.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/sibavogerigafunijirefazu.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/janoforaranafazen.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/sanomibugetibijetavu.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/sevijazawa.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443a29d1d57---tufarogezelesipojuziba.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/7832172827.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/48707661513.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/diguvufujowut.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210915160813_1039327561.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/18684315614.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/bekagatejadukolijepag.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/vojiribumozonixemaliserum.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/widurokuvotanujowa.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_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 10476 bytes
SHA-256: 2a7e7c54ec8d00fdda146a91cca869356ad2f27be22b2d3cc728bccfb1a5e2bd
font_01_sfnt_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 18012 bytes
SHA-256: 52fa78d2cd8379e457f457c66bee435577dfa6817025508e03b6c0518ab32416
font_02_sfnt_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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