Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d7af03120d4c2a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 15:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0dc039ae558688f7ec3e0668aec19506 SHA-1: 6bababe448614d7f0f65c52dafd190968fca55e2 SHA-256: d7d7af03120d4c2a7b70a8f13601650a775975703ee0ec7ac97307a0e324b634
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The embedded JavaScript likely facilitates the redirection or download of a secondary payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://medvor.ru/uplcv?utm_term=popcorn+time+pro+apk PDF link annotation
    • https://bestofbucerias.com/upload/file/wumolobinakewugemefapeb.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132b66633e57---23908410669.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/gubowejunuwirewevabunibip.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/xifisakapuzononudemo.pdfIn PDF document text
    • http://thongthien.vn/upload/files/munenazimomawewix.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109151449005367.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/dasunisererelevuvenikek.pdfIn PDF document text
    • https://bataretak.com/img/files/file/19587737806.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/mawona.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/4277694854.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/xilajikazitebitizelure.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/jotobipikilomovif.pdfIn PDF document text
    • https://stormester.no/files/file/89107546980.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/3446960706.pdfIn PDF document text
    • https://beaszemin.com/files/pamevomiwatesekapo.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/sunabapikob.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/depuma.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/febebanojirotajivejijupup.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/74360670338.pdfIn PDF document text
    • http://sinostandards.net/upload/files/wisubamojugetitew.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/22611338655.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/nanekaxenidi.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/13835317575.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161402b26f2fea---bizukevumadutemaniluvi.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/57610053780.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/92700910459.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_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 10416 bytes
SHA-256: ea26fba9be25797687c57fbbab559d5e20ca1c7bec186a555ebfa0bc384be37a
font_02_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 18328 bytes
SHA-256: 8d979f85dcd55a487976ea5466ed9ddaaf0b856ca0efa4164622123fcb583fbd