Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd7978e3f0fdac6…

MALICIOUS

PDF

64.7 KB Created: 2021-09-12 18:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a05e1bb960e3a7d8fa62d6454fc46d2f SHA-1: 46133f3902c988ddc002fa5bc974886e5d523ea3 SHA-256: 0cd7978e3f0fdac69db9c337ee2e09b8ed8157f9335e590d19ec27ad0ddf7290
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7597

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 https://wastran.ru/uplcv?utm_term=gameboy+ds+emulator+android PDF link annotation
    • http://jeanthompson.nl/ckfinder/userfiles/files/43862009980.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf68362ed---bapijapuk.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138c21b823e1---vowadugasek.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/guponexefodure.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/kogizitewepagudufigiwej.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/18454925102.pdfIn PDF document text
    • http://dytac.hk/userfiles/jamosurasexolepez.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/29428536050.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/renabutetaduxixuxu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/31143342429.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/48797684793.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/37726065225.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/85894133032.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/papanix.pdfIn PDF document text
    • http://geodez.com/pliki/file/vipabazowowuz.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/voniwug.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16136881213df3---14346779304.pdfIn PDF document text
    • https://lordoptika.hu/files/files/28693450712.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/48465092091.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/fobelokona.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/xorusodesewera.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/36994181318.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/pufafixudezakafodufi.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210912_070241.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/53516338822.pdfIn PDF document text
    • 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_off0000d95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95B 18496 bytes
SHA-256: faf317c398d2c8d96130af15eb6c4c11788fc0001e3ab0847b4be0663857ad3e

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