Malicious PDF — malware analysis report

Static analysis result for SHA-256 2012d58642be3a35…

MALICIOUS

PDF

30.5 KB Authoring application: pstoedit
MD5: 9cf17a2f420b4ef0013f8ef0e90a5d4a SHA-1: e9d6d85fb13506f72cd6b6f25afe599c032ba2ce SHA-256: 2012d58642be3a35a9667832be7bed727b55565bb8c6bb0023373c79e73b9a40
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The ML classifier also strongly flagged this file as malicious. The primary attack pattern involves directing users to a network of external resources.

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://drkuoeyecare.net/uploads/1/3/0/3/130379228/bidek.pdf
    • http://rocknreadtogether.com/uploads/1/3/0/8/130874213/nugus_simukoti_daraxubuz.pdf
    • http://hostmaster.equinecentreforchange.com/uploads/1/3/0/6/130621484/8f5248705c1b3.pdf
    • http://merryhillweddings.net/uploads/1/3/0/3/130379474/podetulagebizu.pdf
    • http://mytxreal.net/uploads/1/3/0/7/130775820/5817535.pdf
    • http://www.motleydog.org/uploads/1/3/0/7/130775334/sokupowi-saxuwezufal-fulik-ririmavemejiga.pdf
    • http://unidosporlaprofesion.com.ar/uploads/1/3/0/8/130813400/gupabapuluvemodolon.pdf
    • http://sjbuildersinc.com/uploads/1/3/0/7/130776535/simine.pdf
    • http://pattayapropertymanagement.com/uploads/1/3/0/5/130539676/jesuni.pdf
    • http://101spointecircle.com/uploads/1/3/0/8/130873952/rezedap.pdf
    • http://socleanfrederick.com/uploads/1/3/0/2/130292104/suwegeviviruw.pdf
    • http://www.beccasportfolio.com/uploads/1/3/0/7/130775780/8237207.pdf
    • http://meridian-dcg.com/uploads/1/3/0/5/130539085/8aed5ef3ff7.pdf
    • http://lisettecabrera.net/uploads/1/3/0/5/130588513/4323107.pdf
    • http://skintherapystudioleesburg.com/uploads/1/3/0/2/130288341/nizevuvi.pdf
    • http://derig.host/uploads/1/3/0/6/130621111/figiw.pdf
    • http://allautoupgrades.com/uploads/1/3/0/8/130814192/potif-xopedate-fuwezuxeti.pdf
    • http://host115.carmichaelnl.com/uploads/1/3/0/4/130483519/130483519.html#linear+algebra+methods+in+combinatorics+babai+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001b61.bin
e5f8b1fb6d5bfd0d22f749a151f9c93ccca7831a5946ef1af81930dc9bceef28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B61 7328 bytes

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