Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bd9deb8c635e4e…

MALICIOUS

PDF

40.2 KB Authoring application: pdf-parser
MD5: c3c6c62b9e7113436c71577e06ad39cb SHA-1: e90ba7731f6a544ab0f1a7e44548dbac75be7774 SHA-256: 28bd9deb8c635e4e5ebd3d9bb46ad40e46e07571854e062c022bfc45ab998f7a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern of mass external PDF links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://panamacitybeachsurf.com/uploads/1/3/0/6/130604757/dufuxupo.pdf
    • http://kusogoz.hlfxdata.online/uploads/2020/01/28/9528209.pdf
    • http://ctrader.it/uploads/1/3/0/3/130379353/552f6.pdf
    • http://nillastuart.com/uploads/2020/01/28/18128d375e31b.pdf
    • http://girisasipe.sayt-nedorogo.ru/uploads/2020/01/27/nolujetumazurabor.pdf
    • http://kisunimagi.suddenweblink.online/uploads/2020/01/28/1c4cf9c16f.pdf
    • http://tatepazu.funblog.online/uploads/2020/01/28/pizopubum.pdf
    • http://btbrv.com/uploads/1/3/0/4/130476514/590bf891e67e75.pdf
    • http://musicatkhs.com/uploads/1/3/0/5/130550697/sibilobiketeg.pdf
    • http://modajewelry.shop/uploads/1/3/0/5/130538866/6597b33c7e6f.pdf
    • http://u3abenallatsdropin.weebly.com/uploads/1/3/0/2/130271038/4134089.pdf
    • https://jorapodomefug.weebly.com/uploads/1/3/0/4/130483833/letorap.pdf
    • http://minhavidaminhasescolhas.com/uploads/1/3/0/4/130488320/zajepemag_pumirego_vezora_juletox.pdf
    • http://rc-pab.top/uploads/2020/01/27/natesaruvimabu.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/5/130590162/130590162.html#commander+sk+inverter+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001388.bin
8dba0e77145c75d0e800574e8f74b8f029cbbc1ebca92830b5781a60fdf97b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1388 7852 bytes

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