Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96696728a3c8804…

MALICIOUS

PDF

35.3 KB Authoring application: Adobe PDF Library 9.0
MD5: c85dbe523dd18f1b0e537723f91a9e74 SHA-1: b30be228490f11061b80d8f6b6739038df7e73c0 SHA-256: f96696728a3c8804acc425a4e83957c62feb437bd5a50547ccc93de9b3191c56
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing and link farm distribution. The document body, though heavily obfuscated, suggests a lure related to educational content. The primary malicious activity observed is the presence of a large number of embedded external links pointing to other PDF files, indicating a potential link farm or distribution mechanism for further malicious content.

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://middleschoollessons.com/uploads/1/3/0/4/130476493/1472670.pdf
    • http://feylures.com/uploads/1/3/0/4/130476691/komexifi-norome-titukifefebenur-wutubololu.pdf
    • http://churchconstructionintercessors.org/uploads/1/3/0/2/130289339/zelakilumabif.pdf
    • http://jjsgroup.net/uploads/1/3/0/2/130271240/kujab-jokalivitiji-rebodidof-xedikowaxo.pdf
    • http://cbaptistmurillo.com/uploads/1/3/0/6/130621228/jizujugome.pdf
    • http://motionautodetailing.net/uploads/1/3/0/7/130739267/20c1ce35e81.pdf
    • http://azvrha.org/uploads/1/3/0/5/130540065/xewav_dofekeba_lavuloj.pdf
    • http://anushnush.com/uploads/1/3/0/2/130272388/putizixopug.pdf
    • http://troop827.info/uploads/1/3/0/7/130776350/wuwesof.pdf
    • http://www.revsrevision.com/uploads/1/3/0/3/130379069/5913e822b85d.pdf
    • http://pioneerwinelouisiana.com/uploads/1/3/0/8/130814513/05f28d83e99.pdf
    • http://mail.theheads.de/uploads/1/3/0/2/130288410/8737671.pdf
    • http://nantongzhihaomianliaoshichang.jhamrick.com/uploads/1/3/0/5/130551512/0a3e11.pdf
    • http://littlebigsmall.co.uk/uploads/1/3/0/2/130272886/xidofilat.pdf
    • http://slidemountaincabins.com/uploads/1/3/0/5/130551299/weronor_zozuzufa_logekiwo_pikotexogovag.pdf
    • http://my-life-juice.net/uploads/1/3/0/3/130379635/foxifulaxopex-vagalafi.pdf
    • http://thedailyoccasions.com/uploads/1/3/0/4/130476308/pefolop.pdf
    • http://spyclan.com/uploads/1/3/0/6/130604863/tufaruxelo_rumasekod.pdf
    • http://granhotelmonterrey-es.devsite-1.com/uploads/1/3/0/3/130323803/130323803.html#grade+12+financial+maths+formula+sheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c42.bin
c58e3c93a907290157139c03ea5a83ab1896a8fc31d14fd74eea9a8107b9b454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C42 7764 bytes

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