Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b5a01b74ffe5f2…

MALICIOUS

PDF

44.1 KB Authoring application: PDF Studio
MD5: 1ee29c91d45f0dba18f5695d3ff417dc SHA-1: a2d35ed85ef01de19fd452ceae28d3bce6d8f9a8 SHA-256: 51b5a01b74ffe5f28342518aa6ef0e28c427a7d482654cb26a344a8aa74d5508
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The ML classifier also strongly flagged this file as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 http://www.yasinrahim.com/uploads/1/3/0/7/130740141/465a56f89f7.pdf
    • http://notaplantbaratall.com/uploads/1/3/0/4/130483364/e960ce7a662c.pdf
    • http://thatsdoctortoyou.com/uploads/1/3/0/6/130604309/4584723.pdf
    • http://shiftingstress.com/uploads/1/3/0/9/130969588/lujilip-fikumulezuju-balogirejoneb.pdf
    • http://orvjamboree.org/uploads/1/3/0/2/130271043/e7168c2c.pdf
    • http://www.liveyourbestlifechallenge.org/uploads/1/3/0/6/130621257/wekevopatatezop.pdf
    • http://truedefdl.com/uploads/1/3/0/3/130313130/3555051.pdf
    • http://griffithfeeney.com/uploads/1/3/0/3/130313196/2002362.pdf
    • http://portalfinanciero.net/uploads/1/3/0/7/130776074/rumemegeg.pdf
    • http://angelssandlot.com/uploads/1/3/0/6/130620320/molivob.pdf
    • http://www.companioncaninetraining.net/uploads/1/3/0/3/130323510/sagagezatetuzak-ledibobupikidox.pdf
    • http://lemonadecandlebar.com/uploads/1/3/0/6/130604299/5235767.pdf
    • http://wildhorsesanctuary.net/uploads/1/3/0/2/130289498/mubulovota.pdf
    • http://demdforward.com/uploads/1/3/0/4/130477945/zubas.pdf
    • http://599989683942754643.com/uploads/1/3/0/3/130379635/dasewuxojemibaxa.pdf
    • http://wordofthecrossministries.com/uploads/1/3/0/8/130814769/sodusefiferob-gemoki.pdf
    • http://lkradio.online/uploads/1/3/0/7/130775907/4a1c6b6d6594db8.pdf
    • http://ldwom.org/uploads/1/3/0/4/130490250/4de5d9ced.pdf
    • http://nsucc.com/uploads/1/3/0/5/130551449/c3d25bebc0795.pdf
    • http://tnblistecadeau.ca/uploads/1/3/0/5/130539309/2119d6.pdf
    • http://roofwastehaulers.com/uploads/1/3/0/5/130539319/worawavujumovenodile.pdf
    • http://pepperminttrail.com/uploads/1/3/0/6/130603858/7968afb8f.pdf
    • http://texasfinesse.com/uploads/1/3/0/6/130621337/53ed450522ae.pdf
    • http://aivl4l.salon225.com/uploads/1/3/0/3/130313178/130313178.html#free+crochet+pattern+cat+bookmark
    • http://wildhorsesanctuary.net

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004900.bin
f4c25b70a254c09a0dbb4700fde4b51cee4a50145dc6c0f0145dbd163c5363d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4900 8684 bytes

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