Malicious PDF — malware analysis report

Static analysis result for SHA-256 706c46d1e4be6dbd…

MALICIOUS

PDF

55.8 KB Created: 2021-05-30 13:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba5eea6131270f300b1c765b31cef04b SHA-1: add831bea6054dd8e20d047a516e7dfc338325e5 SHA-256: 706c46d1e4be6dbdf761ec584b0ed5d8023fef3f902d526a60ccc4277dca5766
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9067

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://aartipalette.com/userfiles/file/nifevigivadelefidup.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8723d97bd---segopawitamaloz.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6albas5f88jhvg786m4k4cien2/detuduradojafarasor.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/qorcmg2f7sf483g6p04u4iksoh/28074556860.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/108522571560982a830c010.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/a0q9tko6bek2qknfo5sb3a5vs1/36753335796.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/eim9rki8r51g2lice9l79odv2s/80003473333.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/c0srjq0adsprstcvis1r2d2ejr/dateni.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080adf4b4693---kazatopapumedegewomo.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/54cb9ab3276153537c284ce32065ce8e/77134778681.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160761cbe5b4c2---sufawegisogunofam.pdf
    • https://vestol.bg/files/file/40631312050.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/3k0hj1qpmu5qdhcmsr56oh46b9/92946516817.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jro20gguj7vnkudpt4g377pten/8281996845.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=conversion+table+grams+to+kilograms
    • http://pro.ovh.net/~tribuene/images/banque/file/71547958288.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d230.bin
c241d7f349adcaf91778417d633a427bcc792dff8e0ce4d954f4b60990367114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD230 5176 bytes

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