Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9efb4ba2b45dffa…

MALICIOUS

PDF

32.9 KB Authoring application: LibreOffice Draw First seen: 2020-09-24
MD5: 67272e2202e8ee4660981386ef981e44 SHA-1: 4f19d934c244a439159c3331b301d3a74123a086 SHA-256: f9efb4ba2b45dffae3aba489dad90d1a849e86d240a6f59f82d0752b90a0ad66
152 Risk Score

Malware Insights

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

The PDF file was identified as a dropper by ClamAV. Static analysis revealed a large number of embedded external links, a common technique for distributing malware or leading users to phishing pages. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, indicating a link farm designed to direct users to various PDF resources, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7708453-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7708453-0
  • 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.
  • 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://humanstellstories.com/uploads/1/3/0/6/130639239/mofisoguj-tebox.pdf In PDF document text
    • http://beautyenpointe.com/uploads/1/3/0/2/130274109/wezebunijibekev_panotup_temonufaw.pdfIn PDF document text
    • http://thendralgardens.com/uploads/1/3/0/3/130379075/4830645.pdfIn PDF document text
    • http://myexpatsipp.com/uploads/1/3/0/2/130273801/4874356.pdfIn PDF document text
    • http://mymoneybuilder.org/uploads/1/3/0/5/130541208/doxofuwari.pdfIn PDF document text
    • http://nanascountrystore.com/uploads/1/3/0/7/130740550/25fa613266.pdfIn PDF document text
    • http://nursingarmpillow.com/uploads/1/3/0/4/130483256/130483256.html#bohemian+rhapsody+piano+sheet+music+robloxIn PDF document text

Related samples 1

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_off000011b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2 9452 bytes
SHA-256: 00f2b87919c43135ba04598725a732ac5521b4cc60d8a9e5d60d34a0a72887bd

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