Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c1d6b7bb535d34…

MALICIOUS

PDF

36.4 KB Authoring application: PDF Studio
MD5: 7c198517b930e976f619969aa5cfa61c SHA-1: 253542ad4d76522e3e3483f2740ac972ce4f3b51 SHA-256: 70c1d6b7bb535d343868d0c154f8c05d362d98e9e82962906348eacc832c309b
160 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. The document body attempts to lure users by presenting itself as IELTS preparation material, but the primary function appears to be redirecting users to other PDF files hosted on various domains. This behavior is consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://icbrconference.org/uploads/1/3/0/2/130270941/rewunapuvij-giguteveledisu-seraxijexotezo.pdf
    • http://michellevp.com/uploads/1/3/0/6/130604988/tuvusoxil.pdf
    • http://sontimes.org/uploads/1/3/0/4/130476271/3cc833e8243310f.pdf
    • http://minedearth.com/uploads/1/3/0/5/130551890/soredefa_jegemebugipo_guwalifa.pdf
    • http://quartzvanitydirect.com/uploads/1/3/0/5/130589346/4918910.pdf
    • http://nexgentest.com/uploads/1/3/0/6/130604737/lifije.pdf
    • https://bevexexo.weebly.com/uploads/1/3/0/4/130476033/1418412584e68.pdf
    • http://btctree.net/uploads/1/3/0/5/130543991/sadaradawadana.pdf
    • http://mikeintucson.com/uploads/1/3/0/6/130640003/130640003.html#ielts+mock+test+online+with+score

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011be.bin
996d2d9831afdb1f7df27088d766bce04efbb454ac456e89eb0098c7df1c72c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE 8148 bytes

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