Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15a101948a57bf8…

MALICIOUS

PDF

51.6 KB Authoring application: PDF Studio
MD5: d5344f7be4de6ce6e70ec8c787445a8f SHA-1: a3ac5333fe7f0b5b992dff0dcf72aacc164d21a1 SHA-256: b15a101948a57bf8e3412a7f37a3172d5109fdee3a4dcb59c0e50ffe4b9fbdd2
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users to download other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rusawaso.creamzdorow.ru/uploads/2020/01/28/7339192.pdf
    • http://myspiritlevel.co.uk/uploads/1/3/0/6/130621148/3441445.pdf
    • http://norijololi.jetscan.tech/uploads/2020/01/28/tamamolugejoxiw.pdf
    • http://moms-life.net/uploads/1/3/0/6/130605204/8765969.pdf
    • http://rossiternewengland.com/uploads/1/3/0/6/130620372/ledowovewalatugotama.pdf
    • http://pandago.net/uploads/1/3/0/6/130620575/0729aa319101.pdf
    • https://guxelopinafufu.weebly.com/uploads/1/3/0/5/130550980/mimevigagir-zokaraduzador-riwapevibinoki.pdf
    • http://drinkingitin.com/uploads/1/3/0/3/130312973/duvopixereruj_toduj_ligaregupovava.pdf
    • http://ki5fao.com/uploads/1/3/0/7/130740356/fugodufamurufixo.pdf
    • http://foothillsbiblefellowship.com/uploads/1/3/0/5/130538866/130538866.html#dragon+age+origins+add+gift+guide

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ba.bin
555d4ff37a7e08d4cb7b572e0d1f1f4a54e36f1ff3409032f1fd73356f740450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA 8692 bytes
font_01_sfnt_off00007a62.bin
2f79ba52acca039e5c354f09c372eb8b3e5c303dfc88b98fa2ec462876c681ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 16160 bytes
font_02_sfnt_off00008f18.bin
480437884ac0b6d9fcc812d03c56ed28f568666de2b30b44bd42ac9599fc2464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F18 2680 bytes

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