Malicious PDF — malware analysis report

Static analysis result for SHA-256 e223de06e3ea4e73…

MALICIOUS

PDF

82.8 KB Created: 2021-09-10 15:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 3bc0e92a7f5a04b6f0b3a0e663fb1ad3 SHA-1: 8d896dcc075e2640fdaaf718a027cd6ed19e44cd SHA-256: e223de06e3ea4e738a35c9365b3308adcee3d6f352adb3ee9aba957369ebc387
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://geose.ru/userfiles/file/66392632341.pdf In PDF document text
    • http://analhospital.net/file/files/zisujefabitewuvaxip.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/supubilujikop.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/wefijawarepufogosolu.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/50960623129.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210906092402_4lt8cc.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/vorokosupumamegobe.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/buxufopigaxujegen.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/fikuk.pdfIn PDF document text
    • http://leeandrewdavison.com/download/zarogaxoloza.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/wuwadejib.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/jaforinofolafinuzowur.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/45260009910.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/39060020302.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/02894a31ca333295c353f971fa0624b5/temomekogenopaxarenez.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/41469823975.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/60900705801.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/nuwukivimiwefigoxo.pdfIn PDF document text
    • http://newo.ru/files/files/70411044435.pdfIn PDF document text
    • https://cmf8.ir/data/file/zevipodejozisovo.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/43953143049.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff747d364f---pikuzuxulobasajatesujusoj.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/vipewegadikokixo.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/64867450460.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/14856967928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=camscanner+without+watermark+apk+free+downloadPDF 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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 11192 bytes
SHA-256: 46c74fd6e0f825133c71236fd7f7afdff6247dfedbbf9fede52548ca1cd0d510
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 17628 bytes
SHA-256: ca0199a11c929fdb49043348bd3948ec88aa0431366f2f0dfb2ccd3f221a85c1
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1