Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9e02ed940e8587…

MALICIOUS

PDF

74.8 KB Created: 2021-09-15 21:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9a0bd62245041352b098bed17507346 SHA-1: df19c69c67242e5d54fca46190690be1a581eb4b SHA-256: ec9e02ed940e8587613143ad7e8fc6b674b633970b202755bd46d16a47474f84
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 5

  • 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.
  • 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=fidelity+2020+full+movie+online PDF link annotation
    • https://csn-alliance.com/data/files/84907051206.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/34704203930.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/31855610249.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/nipatadifebukuku.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/54446198997.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/87119896722.pdfIn PDF document text
    • http://melvin.cz/data/57382117073.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c134d907291b447ab12ebcded01f0dc2/zemazuzivalalo.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/vogetinubanuzonig.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161387ade21555---xeromobaka.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/wonikof.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/58574569909.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/pezuzebe.pdfIn PDF document text
    • http://remobudostol.pl/pliki/7822045561.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/1762399787.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/visabasagadomi.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xijifovojutipobaf.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133ed58e3602---setuzevudirine.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/23587746973.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/kamof.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/747313210613eb13eed88a.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/rutanidufaderumuxavemax.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b07f9a3b6941796065ac5b3c485364d9/julikunexobowisiwulivof.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd47176508---67163158510.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/76267265832.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/tireroditutakir.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_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 17828 bytes
SHA-256: c1a2c7bb596d2371ca3d0734112e024aedf84fbd0f64bc655b42ad4214c39b78
font_01_sfnt_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 10584 bytes
SHA-256: fdf05108fa11b81b789efb6eca770fcae41e6edf98fcaf26119c5721edd85427