Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01a5132d04ca66c…

MALICIOUS

PDF

41.0 KB Authoring application: Inkscape
MD5: d0e0830d4538c244d37b49ba1d4d93b1 SHA-1: 15e587338cefd3669f1e0672d86cf6beb55e0a0f SHA-256: a01a5132d04ca66cd691efed45db3740441bb458c22fecd67d94fda1b88e4d46
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is largely unreadable but contains references to the URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://tofol.hoex.ru/uploads/2020/01/29/5760151.pdf
    • http://wilorevoz.exale.pw/uploads/2020/01/28/gavalalomuvub.pdf
    • http://relaxitswater.com/uploads/1/3/0/4/130435763/8adffec.pdf
    • http://bambusaglobal.com/uploads/1/3/0/6/130639685/4690631.pdf
    • http://whitewatercottages.com/uploads/1/3/0/6/130604884/1797615.pdf
    • http://bringyourinnerartistout.com/uploads/1/3/0/6/130621485/e953d9e738419bb.pdf
    • https://fufijuki.weebly.com/uploads/1/3/0/4/130483364/b6733fcfabe.pdf
    • http://ether-pro999.info/uploads/2020/01/29/3029062.pdf
    • http://myemilyknight.org/uploads/1/3/0/4/130477287/sujabamavepuxu-gexovobodulizi-digofufel-xusopof.pdf
    • http://anchorfertilitycare.com/uploads/1/3/0/2/130270918/2597099.pdf
    • http://bishophomeservices.com/uploads/1/3/0/2/130289290/740ba3779ad4b17.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/5/130551399/130551399.html#flat+carbon+fiber+sheets

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012dc.bin
78abce44d754d3395359e34c9bd0ddcfa5ab12b83e384e2a1d04ece8a50b3ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC 8828 bytes
font_01_sfnt_off00006506.bin
3bbda7b3b17b1987a96512e13a0a8feab57a28707129b34af62db9440b3e9efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 2648 bytes

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