Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c11847f370c9ca9…

MALICIOUS

PDF

59.8 KB Created: 2021-04-17 16:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 418c8273fa970d6ca4ea68e372769f20 SHA-1: 293966eacc97fdb19bc9282b62ae03e47b5ab9b4 SHA-256: 7c11847f370c9ca9f6b5cf7248da6ba42d5085471c6f2dcdcc582134b43c44f8
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7704

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.friendlycc.com/sites/default/files/webform/mitiporaju.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/sowasipaxezok.pdf
    • https://ambrose.edu/sites/default/files/webform/59680287402.pdf
    • https://www.jts.org.jo/sites/default/files/webform/wijuwimitixatedus.pdf
    • https://www.a1touchsolution.nl/sites/default/files/35095474677.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+lie+with+maps+pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/66140853426.pdf
    • https://community.princeton.edu/system/files/webform/jidubiziro.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/10713621665.pdf
    • https://gradfutures.princeton.edu/system/files/webform/buviboxakutovovujigobimis.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/xegenaxug.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/63066688876.pdf
    • https://drones.princeton.edu/system/files/webform/65601020807.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c7.bin
b10beb9b3f1008068a6530a752daad2d444c628c4f034a343beacd51c4f515cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C7 5236 bytes

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