Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed316c44b9d03b48…

MALICIOUS

PDF

73.5 KB Created: 2021-09-11 00:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b42a15fd7b1a82e88153870364bb5adb SHA-1: 3256f5a8a722bd3fae01c3324387c9a78879041d SHA-256: ed316c44b9d03b4898d815dc4715b3c72ceb49fb63742831e5f4e36c6f1323ac
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URLs, many pointing to disposable domains and file hosting, suggests a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature, likely acting as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6144

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=mvp+mvvm+mvc+difference+android PDF link annotation
    • http://blccy.com/userfiles/files/ronuvagusal.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/fidezeb.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/22619616142.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/laxupe.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/56597073918.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/18750672522.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132701082368---kuzalodogoposapomi.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pg5djqlose9scb365m1gnncsd7/wewugerosexo.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/lifani.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/97770537876.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/38954594517.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/32078608009.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/71758865544.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/jekumo.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/jimuginebavejutujujos.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/91166891709.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/fujebavigixeniwiliwal.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/lurusomegonugegokuzuj.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/pejibobonagujonu.pdfIn PDF document text
    • http://zl369.net/userfiles/file/72517768515.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/42046036514.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/9949029484.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/debewiwolava.pdfIn PDF document text
    • http://master-br.ru/img/file/63278595551.pdfIn PDF document text
    • https://yifff.se/userfiles/file/dunofalibo.pdfIn 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_off0000c95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95C 17932 bytes
SHA-256: 602c3287fab04863ad6999a6bbf8308d7cc925c1afe1bc7a825465948aec6c2b
font_01_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 10528 bytes
SHA-256: b692269f52b19a786faf4869edd90ba84559170da36af8397b04b72c88a20893
font_02_sfnt_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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