Malicious PDF — malware analysis report

Static analysis result for SHA-256 98de6fba1a0f87b6…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 01:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f624395202de9025bb16ca09daec9cde SHA-1: 5d1a5e6b17bbaf069558565194f45338de8ef02a SHA-256: 98de6fba1a0f87b6428a8757f668c431d8ceeb12cab11b73369a941a1d574c19
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The embedded JavaScript stream suggests an attempt to execute code, likely to redirect the user or download further malicious content. The presence of multiple URLs, including those hosted on compromised CMS upload directories, indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://philabc.ru/uplcv?utm_term=beamng+drive+mobile+mod+apk PDF link annotation
    • https://ljlconst.com/admin/images/file/suzadojelog.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613711b58ca71---xiwozajudasagoladaledir.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/17786592827.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109162019128550.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/fuziriveki.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131d59fc5e48---molel.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/wobed.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdaa21448e---fedajewatogawawugof.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/zadalasaxadakorurotu.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/diwemitovogada.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/nalikevovizowoza.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/pagevuzitasaxowe.pdfIn PDF document text
    • https://ripedesign.com/app/webroot/files/fckeditor/file/zetigotazixikemu.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/wusikurosexejezuminad.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/31006907555.pdfIn PDF document text
    • https://ka-base.no/images_students/files/kuzodidexepuwog.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/lewivi.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/gezuzamevexak.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/38d4068eacccd4ef20171194b49148fe/40713940240.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/kefuzusiwamumimopefoxi.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/76690884953.pdfIn PDF document text
    • https://fong-cai.com/upload/files/pujudasedekaxixutiwisel.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/16830920904.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/80471587146.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_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 18480 bytes
SHA-256: 4b57aaf4b6f6c0e88064ee2f42e07b90de7d4e1a99e707f3491d7903449b1928
font_01_sfnt_off000125f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F4 10820 bytes
SHA-256: eb602267712862921dd80aba984440290d66745c75a154ade427cd74a15f50e8