Malicious PDF — malware analysis report

Static analysis result for SHA-256 e777c6fb7c20b59c…

MALICIOUS

PDF

41.4 KB Authoring application: Smallpdf Desktop
MD5: a1b252794c5fe3e52c31ce1f5ceea1ae SHA-1: c664772f573b1d3e84e5a8df1c21580dc081bb8e SHA-256: e777c6fb7c20b59cd5f93b6b2d89d16adec42a3e66ef475f2f0a98897e93a28e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample.

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://solsportone.com.au/uploads/1/3/0/2/130270740/zoruw-sipibagakotumit-naposotegixoli-tipuburawanovit.pdf
    • http://www.mentallilness.com/uploads/1/3/0/5/130590739/73755b9c19c.pdf
    • http://mr-jordan.net/uploads/1/3/0/8/130815009/47f1cc96d178.pdf
    • http://mta-sts.mail.tsoliscompany.com/uploads/1/3/0/6/130621995/kananusisafoli_zalox.pdf
    • http://vietnam-responsibletravel.com/uploads/1/3/0/6/130639591/fizofizupexid.pdf
    • http://www.justvanillamc.com/uploads/1/3/0/5/130539316/laxik.pdf
    • http://beautyflower.info/uploads/1/3/0/4/130483592/xesurolo-jutadevofafoxe.pdf
    • http://mta-sts.countywicklowppn.ie/uploads/1/3/0/3/130323405/85a12123e36d768.pdf
    • http://felixfranke.de/uploads/1/3/0/5/130542727/rinoxomanenigik.pdf
    • http://rosesforposies.com/uploads/1/3/0/3/130313671/lobixedafe-sutipebo.pdf
    • http://plr4.us/uploads/1/3/0/3/130379206/7771473.pdf
    • http://baomahuiyulechengguanfang.br3h.com/uploads/1/3/1/0/131069991/131069991.html#present+simple+and+continuous+activities+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c87.bin
7feecbcae9e3cb17f798b215256f31ca0960e4b2df61eb4784711d7f3c2b6584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C87 7460 bytes

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