Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ceae90591d2c81…

MALICIOUS

PDF

43.6 KB Created: 2021-05-12 03:32:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e54003b64a7b7ec5a071f68e53abae29 SHA-1: 20279112a356279bb90bce5375aebe8b3f767202 SHA-256: f3ceae90591d2c81365127fa91a3d0817481800416c2f1b42d8d69906aec0b10
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a "Roblox Account Hack" generator, which is a common social engineering lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link points to known malicious infrastructure. The presence of a 'Download Button' heuristic further supports the phishing attempt. Although no scripts were extracted, the document's structure and embedded link strongly suggest a phishing attack aimed at redirecting users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0142

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.xyz/app/431946152/how-to-hack-into-someone In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B5 30888 bytes
SHA-256: 7897135b5eea2790da5f2296a0b492564bab96eebc45fab4191d6f05e85409b3
font_01_sfnt_off00007ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000875e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875E 18912 bytes
SHA-256: bf4ecd0153dd3a330a8d8544a3db10b129edd23679e66a7dba01ca4f284b0ccb

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