Malicious PDF — malware analysis report

Static analysis result for SHA-256 704dbf886b188beb…

MALICIOUS

PDF

36.6 KB Authoring application: QPDF
MD5: fb6c86bf7d62b7ea6887b98c1bfe6219 SHA-1: 28c6078d82c1f0733338dc56e9420ca1d2628eea SHA-256: 704dbf886b188beb452e9c443dd8e7aadfcf83b8142be9a6948f05ee0669d9a6
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, which is a common technique for distributing malware or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the numerous embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://numberyoga.com/uploads/1/3/0/5/130540240/3523552.pdf
    • http://mojohomeautomation.com/uploads/1/3/0/4/130476185/9424907.pdf
    • http://brownwoodrealestateguide.com/uploads/1/3/0/7/130739680/kajejal.pdf
    • http://napervillespa.net/uploads/1/3/0/7/130739383/1071000.pdf
    • http://nolav.com/uploads/1/3/0/2/130289475/d20c80.pdf
    • http://bluemonstercellars.com/uploads/1/3/0/7/130774966/f2eaf5a83.pdf
    • http://toreyfox.com/uploads/1/3/0/5/130540359/daloji_batubagoxixin_maxilurupesiba_velisok.pdf
    • http://accentbrass.com/uploads/1/3/0/2/130271137/8529378.pdf
    • http://domisolka.net/uploads/1/3/0/7/130739715/biwitexajigisek-vaweb.pdf
    • http://jeanniehouchins.com/uploads/1/3/0/4/130489020/kikubufakekufo.pdf
    • http://babagoosh.com/uploads/1/3/0/6/130605403/8029635.pdf
    • http://ibhpalmsprings.com/uploads/1/3/0/6/130639360/e9fc1.pdf
    • http://northpacifictrainingperformanceinc.com/uploads/1/3/0/5/130544070/3303536.pdf
    • http://beardedbeaverco.com/uploads/1/3/0/6/130639978/kibudidisemenap.pdf
    • http://wholesomevitamins.com/uploads/1/3/0/8/130873801/6833257.pdf
    • http://aqulia-urbis.com/uploads/1/3/0/6/130604804/vasudivozizojus.pdf
    • http://www.ezalternatives.com/uploads/1/3/0/5/130539679/fepubopapafametif.pdf
    • http://milwaukeebusinessreviews.com/uploads/1/3/0/6/130640239/421940.pdf
    • http://churnminator.io/uploads/1/3/0/6/130604344/456135.pdf
    • http://carasueachterberg.com/uploads/1/3/0/6/130640059/1ac1191eb.pdf
    • http://www.executivesounds.com/uploads/1/3/0/8/130874580/7711967.pdf
    • http://consciousrealignment.com/uploads/1/3/0/6/130639146/130639146.html#animal+worksheet+coloring

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a5.bin
c138e5a874359189fdaaaf2d3aef540a2cc7d41f8e0470d336407fd44aeebbd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30A5 7276 bytes

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