Malicious PDF — malware analysis report

Static analysis result for SHA-256 b442550b98124aad…

MALICIOUS

PDF

29.8 KB Authoring application: OpenOffice.org
MD5: 203ece78be1a48ff12e0e1eb8f2c955a SHA-1: 4096714e91e871c5828f4aaeae39c6eea8497ba0 SHA-256: b442550b98124aadf82126b5f6586d8381023b939c933a2976e2c28cdbea3f7a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body mentions 'Houghton mifflin english grade 3 answers' and 'Help with Opening PDF Files', suggesting a lure to disguise the malicious intent. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection scenario. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://xevikokesuma.weebly.com/uploads/1/3/0/5/130542859/048623.pdf
    • http://morrismanagementinc.com/uploads/1/3/0/6/130621285/7782910.pdf
    • http://metroheatingandair.com/uploads/1/3/0/3/130313166/9520254.pdf
    • http://stullinvest.com/uploads/1/3/0/4/130435805/6134025.pdf
    • http://vinyl-strategy.com/uploads/1/3/0/2/130288720/nupirodad-gemix-junupotav-tatitemopobi.pdf
    • http://bakersman.ca/uploads/1/3/0/5/130538925/8409232.pdf
    • http://slsfnc.com/uploads/1/3/0/2/130274109/637169.pdf
    • http://nakedyogadallas.com/uploads/1/3/0/5/130588693/tesafuwe.pdf
    • http://pvcdesignz.com/uploads/1/3/0/7/130775778/sowopalijoluwuloxofe.pdf
    • http://mooreinnovation.org/uploads/1/3/0/5/130589302/255287f7b.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/5/130590535/130590535.html#houghton+mifflin+english+grade+3+answers
    • http://mrmacbible

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f3.bin
2bd3932f55a8935553b7a2704a1614ffe4cd87832168487ab9db132ef9c7cb93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3 7668 bytes

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