Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3235902d89d1df…

MALICIOUS

PDF

29.5 KB Authoring application: Adobe PDF Library 9.0
MD5: f0a2f05fe7f68ea804acc8374459aa40 SHA-1: 7fa78f44a3a522e78cb85f203ffbdad90e40c39e SHA-256: 5c3235902d89d1df9cc10bbe3c073b1b50639d45706b6e55fe02b1aea8325dfe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm of external PDF files, disguised as a Canada visa application. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and the ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 confirms its malicious nature. The embedded URLs are likely used to host further malicious content or phishing pages.

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://zem.suot.pro/uploads/2020/01/28/vuwifosafuwomema.pdf
    • http://xebufivo.comparatuapuesta.com/uploads/2020/01/28/bavofulu.pdf
    • http://ritumet.lead2rose.com/uploads/2020/01/27/lesofaxobiz_gugaxodom_dezam_fezazawaw.pdf
    • https://zakaxulanules.weebly.com/uploads/1/3/0/2/130273624/45d44b4647951f4.pdf
    • http://nezunirefu.onlineevents.tech/uploads/2020/01/28/433874d4e8.pdf
    • http://wenezes.ssushi.ru/uploads/2020/01/27/64ffa5.pdf
    • http://wowewi.vipiski-besplatno54.icu/uploads/2020/01/28/kanawarupalakop_javewafanu_vafazuxiguke_dulukijuxijiru.pdf
    • https://nijijejobupa.weebly.com/uploads/1/3/0/5/130541662/130541662.html#canada+visa+imm5257e.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001126.bin
f28c64a534b9475156ba41608cbf01766aaf10b97d2d44a1b461336cc91186df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126 6844 bytes

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