Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dd89ce98aeb02b…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 00:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e50b4c340595c3a3a4d8d268ea67c2ff SHA-1: fe9ce23d7f9f3108eba8ea706b28156079fec4d3 SHA-256: 07dd89ce98aeb02baf15eac569490bcb97a23892f7818a5aee082c5881099f56
134 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to potentially harmful websites. The PDF's structure and the presence of many links suggest it functions as a link farm designed to obscure the ultimate destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=vicky+tracker+apk+download+old+version PDF link annotation
    • http://www.americaninvest.net/upls/files/66503493881.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/masovekenaxi.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/lewunu.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/41416878445.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/runuzuzadefemaroboxojal.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210903_226192765D6D43F5.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/narugijosowapaxuvaga.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/zetowetov.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/tigogejamufuwutofena.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/35522721691.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/kawajoxosasuvu.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/puwolubovog.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/42773627956.pdfIn PDF document text
    • https://kiptep.ru/file/wofazozoforopus.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442c6be5cde---52821154241.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70276782169.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sugutolebogoba.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/77027281261.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/21755759875.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mhhscusch1gv143q95r6e201l0/bodutafefuzekevesodanez.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/nadesiwifedebifoso.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109120750081236.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/vesitiwogosiwu.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/tixebanek.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/19036510717.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 18676 bytes
SHA-256: db3be7357f4a79ad63fb5c93350f55c546be32759733cfd230e45082f34bc70b
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 10832 bytes
SHA-256: 49d235d9a8177911e86fcd85878f1174cd81b054a89494a00cdee0a2eafe5d54
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1