Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef813d24aa18310…

MALICIOUS

PDF

39.1 KB Authoring application: PDFedit First seen: 2020-09-07
MD5: a4eec60fadc2d8c90f3e4ea31572223a SHA-1: 77144f1e8d9b9eabd3e495384cbaa3b682265d54 SHA-256: 8ef813d24aa18310d29fd05b47c804378199aed5865105e856bfb932a4a43a38
134 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs pointing to other PDF files, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'PDFedit' and 'Birads o mammogram', potentially used as lures. The primary attack pattern involves tricking users into downloading further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zoux.com/uploads/1/3/0/6/130603834/8559123.pdf PDF link annotation
    • http://vietwiki.com/uploads/1/3/0/6/130621095/b5aede.pdfIn PDF document text
    • http://montgomerycountyhumanesocietync.com/uploads/1/3/0/5/130550824/nunuwajirolun.pdfIn PDF document text
    • http://mhrandlenovels.com/uploads/1/3/0/4/130476215/130476215.html#birads+o+mammogramIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C 8736 bytes
SHA-256: 7f36c97ab06082e7a8584e929140adca457cecc66c5e4894125e29abd81403f2

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