Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6addc8804a8cb5…

MALICIOUS

PDF

59.8 KB Authoring application: Karbon
MD5: af407cd85d0e7ecdf0b29d5486a8d16d SHA-1: d9eae3cf37377120311a6d1c55c7ff582cbf6e4e SHA-256: 2a6addc8804a8cb558b6e3fc81589f1baf0b4bb3d0c7ac313d35a0f70f9f8f7c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm or redirection scheme, often used to distribute malware or conduct phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trainingcenterchurch.org/uploads/1/3/0/3/130313728/8819881.pdf
    • http://erosrodriguez.com/uploads/1/3/0/4/130488096/8a3ba7.pdf
    • http://27000grainsdecafe.ca/uploads/1/3/0/5/130551059/6599309.pdf
    • http://ributipubu.storyzonline.ru/uploads/2020/01/28/388978.pdf
    • http://guxewuma.drbash.tech/uploads/2020/01/28/4587212.pdf
    • http://mygametruckcostamesa.com/uploads/1/3/0/6/130621663/8125868.pdf
    • http://miniturecowboysrus.com/uploads/1/3/0/2/130271042/vabuxokagepexipa.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/6/130604962/130604962.html#modelo+de+base+de+datos+relacional

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001291.bin
11364657cea7200d3e3a3b8b95175457eb584fe92c1d8e0770db779f518fe9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1291 9364 bytes
font_01_sfnt_off00009b24.bin
c7143368894299a997ed09f05024df052d964886bc902d598de4a6791c50751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B24 10292 bytes
font_02_sfnt_off0000b0f7.bin
7d0e4f26927737c593ed7efda103a1107150fe3ac8ddbcafaf6ee6c0af50a0b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F7 1588 bytes

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