Malicious PDF — malware analysis report

Static analysis result for SHA-256 c673394a196ff406…

MALICIOUS

PDF

66.5 KB Created: 2021-09-08 11:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d482c154d589da4d4c6ab4a5e1de199e SHA-1: 10d0b2cfe73305aaddafd5d34af99ed929dff0d3 SHA-256: c673394a196ff4064fe05d73eeb35bc863085c9c85f5abd3c82ed33b6adea1a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS platforms or appear to be disposable. The primary purpose is likely to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5479

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://the-bom.kr/upfile/files/67999166306.pdf In PDF document text
    • http://bearings-home.com/userfiles/file/97018005503.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/60515788456.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8b9aaba8e---1052688438.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/81218251818.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/65141832241.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ee6aa2bccb6561ae077bedb9ca7c3ff/45415912843.pdfIn PDF document text
    • https://masukpt1.com/contents//files/74885148981.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c450b18c2---80069669464.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4534c0973e---13119515449.pdfIn PDF document text
    • http://fedime.org/imagenes/raxexotulidizapasukofutos.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/jabapalupukosuwupen.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/wumoxuxapuwise.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/33269040939.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/zuriz.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/mafuwirivalosapogajotimem.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae5b4ef08---75091031062.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfc4fbb6d3---85904624289.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/fasuvuxonasekuzojofetox.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/rovazulitigejuzipo.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/guvogenogiwonegi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f241c04c2ff---62925524156.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/74c10325ffdb33769398a976ea52711e/munavinemumudebebozu.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/dafadonizorapiv.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/49ec9c4d0c7c4d835cef73ef24b85d00/29480643205.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb3d40ecba---jitiwurakomiwejufide.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=can+foxit+reader+combine+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 10840 bytes
SHA-256: 7f9d6fefcb63c3832ae860fc34e13cf624f6eafa366a11395e58bf808ec5e900