Malicious PDF — malware analysis report

Static analysis result for SHA-256 0265b52027d335b1…

MALICIOUS

PDF

64.3 KB Authoring application: Solid Converter PDF
MD5: e8be342c4f67a8ffe0920fd5c487416f SHA-1: 46e234b142461eadc0610805de9c97f2a8522f62 SHA-256: 0265b52027d335b18755c8910982977a94a34a4165f27cb0c34e06dd71b12f30
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, disguised as a "herblore guide", which likely serve to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing and potentially distributing further malware. The heuristic PDF_SEO_LINK_FARM firing confirms the presence of a link farm designed to manipulate search engine results and drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://hekatonkheries.email/uploads/1/3/0/6/130621973/1279593.pdf
    • http://feja.holidayandpackage.com/uploads/2020/01/28/lerujujererazow.pdf
    • http://jipabuguro.eliadore.com/uploads/2020/01/28/4433811.pdf
    • http://nelsonkimeofficial.com/uploads/1/3/0/6/130604770/maxugejedekezar.pdf
    • http://contentmentcoaching.org/uploads/1/3/0/6/130620479/ragijovusiwokij.pdf
    • http://oddenilssen.com/uploads/1/3/0/2/130288729/jadar_lowuj_posowew_jexorebedupido.pdf
    • http://mwilkinson91.com/uploads/1/3/0/5/130551585/1684018.pdf
    • http://miracleinabucket.com/uploads/1/3/0/2/130291029/130291029.html#rs3+99+herblore+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001216.bin
adb01edcbcb06869b9c3f247f2ea0634fd5c7d7f1442726142d15d9e1e65e657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216 8816 bytes

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