Malicious PDF — malware analysis report

Static analysis result for SHA-256 560e9f5d34d84e14…

MALICIOUS

PDF

40.0 KB Authoring application: QPDF
MD5: cd828e1bf48cb13891778220c5d2e34c SHA-1: fb69af3cb38d4567967df12293549bdd2013f3ba SHA-256: 560e9f5d34d84e14d2bdbf063308e48d051d3938d446ade030c2ab85fc0643a3
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various external PDF files hosted on suspicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body mentions 'Ragnarok m pet adventure guide' and includes URLs that appear to be part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nerdsville.org/uploads/1/3/0/6/130604924/9061134403b0306.pdf
    • http://solit.studio/uploads/1/3/0/6/130603827/gibepi-jezubalej.pdf
    • http://gabrielledrouin.com/uploads/1/3/0/6/130621165/475864b19.pdf
    • http://chaselea.co.uk/uploads/1/3/0/7/130739204/tuzozixonotigilo.pdf
    • http://popsinc.net/uploads/1/3/0/6/130621625/kovuv.pdf
    • http://nadinebrockel.de/uploads/1/3/0/2/130288441/remavenik_mafezu.pdf
    • http://alextindall.net/uploads/1/3/0/2/130270946/130270946.html#ragnarok+m+pet+adventure+guide

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112b.bin
6eb44be33baf54ae41fa92029009c296ae41fd9dc391cb9ba351dc07db32c95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B 8680 bytes
font_01_sfnt_off000050e2.bin
664f7d1740eb9ba5e7aba80bf1980037543abe2127f66d63dd4736a3c717137b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E2 2816 bytes
font_02_sfnt_off00005a28.bin
2390906050088d612edabb8193da25be1f22e9f255b1f3ac014f1e8d0d878680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A28 5056 bytes

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