Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d72410fc320b8e…

MALICIOUS

PDF

37.1 KB Authoring application: PDFedit
MD5: f405b1884b734a1a064781ea87a1e6a5 SHA-1: d680a9d002b5e0b922a90519bebf60b6fb653eed SHA-256: e4d72410fc320b8eea15dd67869b5428453186f5940348a66b7cd06e51578856
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO poisoning and phishing. The document body advertises a free English speaking course software download, which is a lure to encourage users to click on the malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://marythemidwife.net/uploads/1/3/0/5/130543210/vazezida_wajononew.pdf
    • http://nursisociety.org/uploads/1/3/0/6/130621854/miladexejimepudolire.pdf
    • http://bennettallenwood.com/uploads/1/3/0/8/130874424/jutopaguwanavokisu.pdf
    • http://skyleslawfirm.com/uploads/1/3/0/2/130289209/ded1423e91974b5.pdf
    • http://www.bmbedding.com/uploads/1/3/0/5/130551132/zewilafatovijofabeku.pdf
    • http://notforprophet.net/uploads/1/3/0/8/130814174/315d49153f.pdf
    • http://accidentallyorganized.com/uploads/1/3/0/5/130588288/1073618.pdf
    • http://theego.org/uploads/1/3/0/6/130603747/7967033.pdf
    • http://emrekulali.com/uploads/1/3/0/4/130488964/bepobitesukuvoke.pdf
    • http://donnadoyle.pink/uploads/1/3/0/5/130542829/pogexexe.pdf
    • http://leguyule.br3h.com/uploads/1/3/0/2/130270990/130270990.html#online+english+speaking+course+software+free+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a48.bin
d3e1e4696ed14740f28917b6939051697d51346059b48fe598c588854eff148f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A48 8248 bytes

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