Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c7e8f47ba60e13…

MALICIOUS

PDF

74.9 KB Created: 2021-10-05 08:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff75bc03ef5e485cd57c983ec8cad4f9 SHA-1: c30aaa3bb7851aceac5a8ee50db05392b2f60ab1 SHA-256: 69c7e8f47ba60e130f5af82f28aba3e45f07cfc3382b1e55fd9d82adc35456c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting, likely to distribute further malware or conduct phishing attacks. The presence of external URIs and link farm characteristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6200

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=current+quiz+questions+and+answers PDF link annotation
    • http://jingkangchem.com/upload/files/repikatedifagiza.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615579a22301d---mukafikuvusarope.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/vamixeferiruwonutarinux.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202110030414054973.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/rewex.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/83332055060.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/21354579412.pdfIn PDF document text
    • https://saya.ro/app/webroot/files/userfiles/files/25189468855.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/33406352794.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/71447602480.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/nepezolima.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d3ccd24f2f6ab89bdd11e440aedbd12b/wezekilimifikipim.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/xikofubifaxewolezufapop.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/28838992340.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/zotadateninixexedik.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/bozitifarebaragojusajoj.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/rp4tan8i7rh395fu0mct0i427g/79733252878.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/17073457640.pdfIn PDF document text
    • http://sun-tes.ru/files/file/94218323180.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/46680501913.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/25956865603.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/gufukipotifozoke.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/fijofefewubopugo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 18152 bytes
SHA-256: 2676501506468362b91fb6d5cb8d5d7c204bf0d7145f337e619db1ca69b1caba
font_01_sfnt_off00011548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1