Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfee5b8f1df4b6e…

MALICIOUS

PDF

70.1 KB Created: 2021-06-04 16:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085d8780c9aee3b17ff98fddfb62df60 SHA-1: e2150f4591cdd268d9d23520757f68f8d3bd7288 SHA-256: fdfee5b8f1df4b6ed588db0e3fd1727e8720398002deab4001bdda24edc71cd0
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure for downloading software, specifically mentioning 'microsoft project para windows 7 64 bits'. The presence of external URIs and compromised CMS upload links indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8215

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://drafthe.ru/uplcv?utm_term=descargar+microsoft+project+para+windows+7+64+bits
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608daf1e4ceb0---71476449095.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/eotjhompe2a6n9s2grmhnplc1u/vopuwabur.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/84910e7cec07c940d822e9e453d3129d/62703270694.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaa6ad4c45---60548348926.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/fe1db748242b6ad46b866c83148bb799/55184479096.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/tlhcdenef3jefoegt2hub9gqsl/gefizukeguvuzamoxunato.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/00c2c5a73b31cc6ace119a49a1aab28f/gopejoxixutod.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o39kol2mspp2vitcijn7bhg0u6/98072680667.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4dc9cf686---2252508310.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609835e6ca5b4---84343363835.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1338090330609eb82e8624a.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3voeoqjhmupc85vgttg2qge9qe/35722270898.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020f164e5---44263374997.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/g99fla1r96mm09sclfjknngqjb/jewetitopafiwuwikuwa.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/47abea26f9d2706875caffd12e5d0a17/5803840333.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6437448d8e6c2bddba399eeea333d56f/mujuvibemefoxuxodanivij.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a6f4381e0---3513571775.pdf
    • http://amexeuro.com/an3_Uploads/file/53179801318.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d748562a6d---65333147126.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f651.bin
72bd08c6f1829a25c9f80653797eaabd48aadadd09245d684dec5c2c52f104b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 6072 bytes

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