Malicious PDF — malware analysis report

Static analysis result for SHA-256 760c4a51bdaa7a07…

MALICIOUS

PDF

39.0 KB Authoring application: Adobe PDF Library 9.0
MD5: 661abfd29daaf6c5b0a21761617d7a0e SHA-1: d844506740252507ef869089ded2b787ec37df3d SHA-256: 760c4a51bdaa7a0713641fe25563fbb62c9dd7299414cd94601d6f2177a614c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to distribute further malicious content or for SEO manipulation, aligning with a phishing or spam campaign.

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://gijokofezo.millioninvestor.pw/uploads/2020/01/29/gixugofix.pdf
    • http://bonniesthlm.com/uploads/1/3/0/3/130379254/bb5e86f1cb99b4f.pdf
    • http://niwawriters.net/uploads/1/3/0/5/130551880/7964346.pdf
    • http://mpowell76.weebly.com/uploads/1/3/0/4/130494289/verakedeke-bowaji.pdf
    • http://restorationchurchag.org/uploads/1/3/0/6/130639975/bekaduligum-fipebumubexok.pdf
    • http://obxaerialads.com/uploads/1/3/0/6/130620159/a57a68b1279d.pdf
    • http://essentialmatters.com/uploads/1/3/0/4/130476491/lewagog.pdf
    • http://2handsstudio.net/uploads/1/3/0/4/130483286/ebbd1a5c.pdf
    • http://guruj.asusbot.ru/uploads/2020/01/28/7471172.pdf
    • http://shutouttraining.com/uploads/1/3/0/4/130476786/ropevoj.pdf
    • http://donthirejerks.com/uploads/1/3/0/4/130483454/130483454.html#los+amorosos+cartas+a+chepita+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e8.bin
82d91e7a8fc8e5f6e3f28a4455896785c3879565a5129c5c8283c3da05da986c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8 9404 bytes

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