Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df461f86deeaff3…

MALICIOUS

PDF

38.7 KB Authoring application: OpenOffice.org
MD5: f093f2fc3dd0e31dc5c5c1477685f10f SHA-1: e3cfd21195ff17afdf2714f456cecfa8337b52c6 SHA-256: 4df461f86deeaff374bfe737dd28ce77b6d4c0139926246b4075aed88a27047e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic fired due to the presence of numerous external links, suggesting a phishing or SEO spam campaign. The embedded URLs likely serve as redirects to further malicious content or phishing pages.

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://deardoc.org/uploads/1/3/0/4/130488820/dc7bb51.pdf
    • http://thedoulaamanda.com/uploads/1/3/0/6/130604886/vipiretej.pdf
    • http://vollair.com/uploads/1/3/0/2/130289623/losurexot.pdf
    • http://nosborne.com/uploads/1/3/0/4/130476688/vuluduz_sexuwimotides_nixuz.pdf
    • http://angelssandlot.com/uploads/1/3/0/5/130588984/32202b06268d.pdf
    • http://nidinidi.com/uploads/1/3/0/6/130639061/koxewirovesofabo.pdf
    • http://adoptme.info/uploads/1/3/0/2/130270901/afe631e1634f71.pdf
    • http://kiganu.mypublicwifi.ru/uploads/2020/01/28/9092705.pdf
    • http://theneoneffect.com.au/uploads/1/3/0/5/130539139/130539139.html#a+guide+to+sql+8th+edition

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012cf.bin
39c17fb011a699ee9af9b622804f01351b7d56de2f47eb5219af67ea8e35f604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF 8660 bytes
font_01_sfnt_off00004f9b.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9B 16268 bytes

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