Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0098d5306387a68…

MALICIOUS

PDF

69.3 KB Created: 2021-09-07 20:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a4cd3e3160fe10e6f8886cceac70f410 SHA-1: ef26e82336076e8e9a93729ae2dc707f53fd7192 SHA-256: e0098d5306387a682d21c1f36cde04b5b1db8ca9023ba9335b0c21490aaf323e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

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
  • 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.
  • 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
  • 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://tsegypt.com/file/23259895686.pdf In PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/7631e43fab443317afe620037a6f8585/gixitinokudir.pdfIn PDF document text
    • https://webrobogo.hu/kepek/fegigikozegiguzaril.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/wukes.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/86edff67082567c94817f62fd9027057/19123820955.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cd633c83f28569d267e814e4ac3ba165/31427474670.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/kibuzalaxunefife.pdfIn PDF document text
    • http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/nukofepa.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ba81ed0b9---71027191853.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/92218781773.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45e6957fa---40586918693.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e7fa78cb4---dukolunuxot.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a2f52b85b---vufavelipatebuf.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/vifugivugojixowuredenuva.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/15588209555.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/57502720604.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/7aa22e515b8fd98233f4b121e6983855/jirifajolilisiba.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/tukufekedojolajesi.pdfIn PDF document text
    • http://chayka-svg.ru/files/kurigitalilonabuwaparup.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3eb6e5e1bf3565982cff29f894b30777/78605631069.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/zesuwu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/86d073f8d0a8714bfa81f3aded626f1f/mapijisozatelametakad.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/66004900893.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/3501121217.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/buvotuvusemekakajebej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=on+the+partial+difference+equations+of+mathematical+physics+pdfPDF link annotation
    • 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_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 11268 bytes
SHA-256: f131d71d8a4011a303cc8a3b4518576b3a4d9de23af61c2a5ae6f0e58c238283