Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a6269cdad4d212…

MALICIOUS

PDF

34.2 KB Authoring application: Solid Converter PDF
MD5: e5ae27711514931d79e49f974867fe1f SHA-1: 9c3d3547c64eeaf7ee96a6a2424abec765b8bb5a SHA-256: 13a6269cdad4d2124cb78213c33622bccf1c3f8792c59bff0f7776d33407197b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary IOCs, suggesting a campaign to redirect users to further malicious sites.

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://coloquioespanacee1979-2019.com/uploads/1/3/0/6/130621582/faxom.pdf
    • http://chipmunkvt.com/uploads/1/3/0/6/130620427/99807.pdf
    • http://312thlegion.com/uploads/1/3/0/7/130776827/29217d946a.pdf
    • http://hostmaster.accentplanks.com/uploads/1/3/0/2/130273748/xusezesekorujum.pdf
    • http://rightofwaysolutionsllc.com/uploads/1/3/0/2/130270911/9a91e.pdf
    • http://britishorgay.com/uploads/1/3/0/6/130621511/bigodegul.pdf
    • http://separate.clothing/uploads/1/3/0/6/130639100/4978107.pdf
    • http://prestigecateringhamilton.com/uploads/1/3/0/6/130604416/gesaniripifuno-dazegatu-nibilazof-wisumefupowew.pdf
    • http://bfslyc.org.uk/uploads/1/3/0/6/130621402/661384.pdf
    • http://www.corearabic.com/uploads/1/3/0/5/130590435/1119155.pdf
    • http://webdisk.bardosdiamondsports.com/uploads/1/3/0/5/130588708/130588708.html#rezultat+admitere+academia+de+politie+2018

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f2d.bin
f9efdccd59988e922d91270ee50a1bc91c559bf744aa3e980b447f11346748c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 9060 bytes

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