Malicious PDF — malware analysis report

Static analysis result for SHA-256 21bdfa8918dab33c…

MALICIOUS

PDF

27.1 KB Authoring application: Soda PDF
MD5: b5a2744d6ea23cc2d09b96fa797dfa51 SHA-1: 2851b2100bba885e98717f6343715554e411443b SHA-256: 21bdfa8918dab33cd4a63e963ec5a896c02e7e0e5398bca204ab049cfc28b3db
150 Risk Score

Malware Insights

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

The PDF file exhibits a critical heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a mass of external links. The document body contains numerous embedded URLs, all pointing to PDF files hosted on various domains. This strongly suggests a phishing or malware distribution attempt, where the links are designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports this assessment.

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://drhiura.net/uploads/1/3/0/5/130540928/sadin.pdf
    • http://www.spoletogreenfun.org/uploads/1/3/0/6/130603753/ponovimusomo_pofatezobawe.pdf
    • http://gvjhmusic.com/uploads/1/3/0/9/130969204/39d1fd194.pdf
    • http://stfrancisxavier.org/uploads/1/3/0/6/130604133/4b041.pdf
    • http://nybellhouse.com/uploads/1/3/0/4/130483551/boxinusogijixo_rikefogex_xasatekoki.pdf
    • http://municipalbondfraud.org/uploads/1/3/0/5/130539935/volerap.pdf
    • http://getpolishedupwithamanda.com/uploads/1/3/0/5/130588377/labesovugix-voxat.pdf
    • http://farmersmarketdogfood.com/uploads/1/3/0/6/130639212/2317866.pdf
    • http://bienchulitos.com/uploads/1/3/0/5/130550874/vilakipalenafeza.pdf
    • http://austinaction.com/uploads/1/3/0/3/130379287/depazajojudum-refij.pdf
    • http://elitepropertycleaning.com/uploads/1/3/0/6/130604972/22971cc6860.pdf
    • http://doloresgrillocoach.com/uploads/1/3/0/6/130639017/mutukojonobewe_sovilagavori_napumuvukufuwe_xekebufit.pdf
    • http://tipmebro.com/uploads/1/3/0/6/130639882/gudirad_bakededozupok_pilivi.pdf
    • http://74-123-78-29.mgwnet.com/uploads/1/3/0/6/130640063/130640063.html#sadness+and+sorrow+-+naruto+piano+tutorial+%28synthesia%29

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000155c.bin
5375dfceae781fe631f6917b32a6989dfa8f044788149e11a6ba8ef47d8f04e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155C 5964 bytes

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