Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab3168d7936612d…

MALICIOUS

PDF

29.1 KB Authoring application: Smallpdf Desktop
MD5: 726228eab45ef47da7a54fdf4998497f SHA-1: e9cdf9fe92f42e0b9e628634bb06e4823e3b45c6 SHA-256: 5ab3168d7936612d26de217702758d2d4721e83a103d6c0d845d5814a6dbf081
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external URLs that likely serve to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or SEO spam campaigns. While no explicit script was found, the embedded URLs are the primary indicators of malicious activity.

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://pedahzur.com/uploads/1/3/0/4/130477135/985855.pdf
    • http://trailofhumanity.com/uploads/1/3/0/6/130604810/eb2d6b56.pdf
    • http://detifipizu.bestrobloxhack.fun/uploads/2020/01/27/zuzip.pdf
    • https://pomanipusutuluw.weebly.com/uploads/1/3/0/5/130539305/3025048.pdf
    • http://eastcoastspeedwaytv.com/uploads/1/3/0/2/130289636/volunazuvi.pdf
    • http://deluxehomestaging.com/uploads/1/3/0/5/130588267/ead394.pdf
    • http://nevafosut.ars-shipping.com/uploads/2020/01/28/6320406e876357f.pdf
    • http://communitycure.net/uploads/1/3/0/5/130588703/0f9299f.pdf
    • http://cummingtreeservice.com/uploads/1/3/0/4/130475990/9108585.pdf
    • http://goodbless.us/uploads/1/3/0/3/130324152/ramaz-bevewi-terowasutunedo-mapexemim.pdf
    • http://montecitoluxuryrealty.com/uploads/1/3/0/2/130270796/017fd.pdf
    • http://nicolesnaturals.blog/uploads/1/3/0/6/130605267/tixenasisexiludawule.pdf
    • http://portal.createweb24.com/uploads/1/3/0/6/130605074/130605074.html#baldwin+filters+catalogue

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001275.bin
015ef0eaba6dc5d9168144aa37f0fc86a957440cbe04f4df72fe42cbfb1cf033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1275 7108 bytes

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