Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e7af2a36982324…

MALICIOUS

PDF

80.9 KB Created: 2021-09-17 16:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 228c1682bd48b51a4d18bf1b6d4f39b2 SHA-1: 6f2b421acad7ca6d8e71a21ab32b5d01d46e6701 SHA-256: f4e7af2a369823240163eff9832008ccfc459d3873fb3337de74bb706336b2a6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://faguaflowers.com/images/admin/file/28422799932.pdf In PDF document text
    • http://www.szphotar.com/admin/img/files/66424499984.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/31866574305.pdfIn PDF document text
    • https://somogyplusz.hu/files/54795216879.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/20673114851.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/jowufezaweludeguvumefipon.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/gebup.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/52994207872.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210916020448.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091223512480.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/mekurazujozi.pdfIn PDF document text
    • https://happen.webasl.com/userfiles/file/vikopiso.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/20987741476.pdfIn PDF document text
    • https://migger.dk/userimages/file/17150816863.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/gagumedojovemonod.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/dedijerexedapepunowonomi.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/25249f570c86b77be1d83de247c6a887/xebokowesixupinizo.pdfIn PDF document text
    • http://precisao.org/files/files/zadagivepema.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/87660305856.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/94327397141.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/60167617278.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/sezuxuweveretepuvuvitigor.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/82555292632.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/73987524809.pdfIn PDF document text
    • https://ccskin.com/geektic/files/zarobuxewuwok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=gangstar+vegas+multiplayerPDF link annotation
    • 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_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 17620 bytes
SHA-256: e2645a928065786c5caf1bb4c6af9ec18af45c0327e17e80f736376c1758b4ee
font_02_sfnt_off00011d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5C 10792 bytes
SHA-256: d35238f3e14ae2270d5341413f5032e4aab0f1fea336471df538c9d90ca35049