Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4a3d6521a6cc6b…

MALICIOUS

PDF

58.5 KB Created: 2021-05-12 09:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a5d9afabc5e94893aafc8ce5ad8a5d SHA-1: b080de151873d0fdea0f10c757e430af58f217a9 SHA-256: 3d4a3d6521a6cc6b1c1810ddc97daed75723de9e51063865c665b58d75598f4c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7953

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://infrive.ru/uplcv?utm_term=constant+velocity+particle+model+worksheet+3+key
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ktppi06hj1mi03pju24psfveo0/bofazosaguvexufemeguget.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f61d463f7e---gopalewu.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/l9uamt7rk4josvjk7gp51f5qka/46463742810.pdf
    • https://raiporjai.com/piceditor/file/pepebenibugufolapizuzu.pdf
    • http://sugarfree-gelato.com/upload/file/28643175966.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/fias5ne26tq0ktp9vp9sqp7791/5848315415.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079d46c88ce0---40442233736.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160982ba142a7d---biviraxifomeni.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3lhr36gjqno2f8om1ra2cvfkj1/50232702571.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160989f56c8a24---biderutus.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4e66pu1eekoaqaqqgf8vi7o183/93581398718.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/vuuti3dsbgh44fjupdiepjiq3c/pexivoforupasuza.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/1hs3ebm1e8b3s9iepoarph1val/51483127893.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16090d8ff6d374---12464113096.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/dfa8c2q6ih68io6272sbrp0c9q/69810933699.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_off0000dbda.bin
cbea6f81300afd33f942b1e2506cc696a5a082e46261c490f47e867cacee88f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 5700 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.