Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53f0c9dffaaeb4b…

MALICIOUS

PDF

46.6 KB Authoring application: pstoedit
MD5: 181d6c3e4041a128ac22104f75757ca8 SHA-1: 0517c0b838a0aaef0cd33b4c5c6ac05cc5aab2b0 SHA-256: b53f0c9dffaaeb4b48638817480db8d437338a64777532347d929b8089534a23
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a tactic to drive traffic to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely part of this link farm, aiming to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://azmendinglives.com/uploads/1/3/0/5/130540645/diwavovago.pdf
    • http://daletouhongtaibocaiyuce.f18.ebkf.org/uploads/1/3/0/7/130776523/sisisodorejope.pdf
    • http://nevewinter.com/uploads/1/3/0/6/130639267/dudofira_vonagosununogi_vosudigepejax_fazobi.pdf
    • http://my-pleiadian-this-n-that.com/uploads/1/3/0/7/130776021/5593839.pdf
    • http://postboxsucks.net/uploads/1/3/0/2/130289603/3555533.pdf
    • http://karraschconsulting.com/uploads/1/3/0/6/130621382/9600429.pdf
    • http://apoaaxi.org/uploads/1/3/0/5/130550672/zerirotepipoze.pdf
    • http://www.vmanglin.com/uploads/1/3/0/2/130271078/615e38db9.pdf
    • http://krystalwillis.com/uploads/1/3/0/7/130775744/2149264.pdf
    • http://cusacklab.com/uploads/1/3/0/3/130323465/sojivavawawito.pdf
    • http://rocksolidskilltraining.com/uploads/1/3/0/3/130323235/wijobi.pdf
    • http://transitadvocates.org/uploads/1/3/0/8/130813330/2151556.pdf
    • http://the-smith-family.rominastiebenphotography.com/uploads/1/3/0/6/130621651/130621651.html#a+rare+case+of+coombs-negative+autoimmune+haemolytic+anaemia+in+pregnancy

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dc7.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC7 2600 bytes
font_01_sfnt_off000059f3.bin
be2ff2083e860c8fee225667d9d55d212cefe115619ceb36516b7336db82d942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 9604 bytes

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