Malicious PDF — malware analysis report

Static analysis result for SHA-256 d811e54545e789f7…

MALICIOUS

PDF

42.7 KB Authoring application: Adobe PDF Library 9.0
MD5: 22c7160c1b0fc2f6cfb342641bff4109 SHA-1: 9213e6fad6ad3681a4c3f0d1938a833c99c263dc SHA-256: d811e54545e789f7f1aacd846f5f86340e84cb6086d17058b1fdcefe5eb4f1af
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, characteristic of a link farm used to distribute malicious content or conduct phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs likely lead to further stages of the attack, such as downloading additional payloads or redirecting to phishing sites.

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://utahslowpitchweeklynow.com/uploads/1/3/0/5/130546036/9004539.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/6/130604525/siposupiguxoloduwami.pdf
    • http://cattywhompus.net/uploads/1/3/0/3/130323593/eb7a8388fcb21.pdf
    • http://modularscience.net/uploads/1/3/0/2/130289577/b97ea9.pdf
    • http://barricksplumbing.com/uploads/1/3/0/7/130739597/pofapapadetemu-xakapojokegi-buvajasigojakaj-zevixegovoluwek.pdf
    • http://www.theberkeleyarms.co.uk/uploads/1/3/0/7/130775551/7228699.pdf
    • http://drewgrahamart.com/uploads/1/3/0/6/130639510/2ac5bcabf9f8c.pdf
    • http://drgordonwhitbeck.com/uploads/1/3/0/4/130489522/fijubixapokomonirok.pdf
    • http://carasoul.com/uploads/1/3/0/7/130775627/3352088.pdf
    • http://phillywaxing.com/uploads/1/3/0/6/130640162/619714.pdf
    • http://wilmingtonladiesteawalk.org/uploads/1/3/0/5/130545954/130545954.html#frequency+polygon+and+a+histogram+have+the+same+overall+shape

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a4.bin
d8e831fd5c16bb5e654b7b979e4077c5b8b5e873486c7d00d5c451c17bd783c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A4 8268 bytes

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