Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8643ba127c14599…

MALICIOUS

PDF

39.1 KB Authoring application: Smallpdf Desktop
MD5: a9cc08a3fbe5d0485c4a297c8b3a218c SHA-1: 9c773f6c3950578ea5cdc5be96706b9014fcbd3e SHA-256: f8643ba127c14599a9984fae828051ffabeeb26ce89d8f4711e93764df9a1798
92 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious external PDF file. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a high ML score further indicate malicious intent. The embedded URL is likely part of a phishing or social engineering scheme to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://labviewstudent.net/uploads/1/3/0/3/130312969/jusutuwidalejifala.pdf
    • https://kokapibinorem.weebly.com/uploads/1/3/0/4/130435875/4d592a6e.pdf
    • http://oiaracing.com/uploads/1/3/0/3/130379407/2059672.pdf
    • http://synodcanada.com/uploads/1/3/0/4/130483989/tavunojepirofir_vakutik.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/7/130740140/130740140.html#burshane+lpg+annual+report+2018

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001061.bin
8ef767e2d08d18a621e5585e43b549c9435f3af775f070ee4cfca08bb3b25583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061 8568 bytes
font_01_sfnt_off0000510f.bin
527c40ffe74b819f18c2206dd42f465160bc6ef26a32b1cb5b5245d48541cbae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x510F 16404 bytes

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