Malicious PDF — malware analysis report

Static analysis result for SHA-256 690102e127d5facb…

MALICIOUS

PDF

38.9 KB Authoring application: OpenOffice.org
MD5: 7bf913b5f45f651ca14731a08e67fad8 SHA-1: c4e321246526d1d2e31467feaf9025669de5e5a0 SHA-256: 690102e127d5facbc6f7a4c02d4d28104fdd029f737de3455ba7b65a95bb59f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to direct users to malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body is heavily obfuscated and does not provide clear textual lures.

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://junbinow.com/uploads/1/3/0/6/130639583/gejekudej.pdf
    • http://zhuangguo94.com/uploads/1/3/0/6/130621045/fesevuw.pdf
    • http://jaxalphabetphoto.com/uploads/1/3/0/6/130639764/selura_ronoburabuxa_keganadolilel_sikuzozarezitob.pdf
    • http://itsmyland.net/uploads/1/3/0/7/130775680/lemosagosinata.pdf
    • http://buycialis.com/uploads/1/3/0/6/130603683/nusaxegoxexabiwilaf.pdf
    • http://romeda.net/uploads/1/3/0/6/130603737/2291365.pdf
    • http://jimstahlart.net/uploads/1/3/0/8/130813663/sezefikesine.pdf
    • http://tanishqspa.com/uploads/1/3/0/7/130739059/faludufepete_tuzifebavux_gubusogigaxelo_muzedezemekukil.pdf
    • http://newcanaandems.org/uploads/1/3/0/8/130814121/fbc86478.pdf
    • http://commongroundsphilly.com/uploads/1/3/0/7/130775536/650c51a7fa9.pdf
    • http://dedicated-20.pleasingfood.com/uploads/1/3/0/4/130477372/130477372.html#dvt+prophylaxis+chest+tube

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004101.bin
c70aac0912ea854632b94c800b694ca3f145ded9e3130b16f3695be2a4c510ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4101 8340 bytes

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