Malicious PDF — malware analysis report

Static analysis result for SHA-256 45495a1d4b185535…

MALICIOUS

PDF

40.5 KB Created: 2021-05-11 19:48:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca3fd908b20ac63040820df832512824 SHA-1: aaad1a1c9544faf92cb3a68f513d9af611dff0fd SHA-256: 45495a1d4b1855357cec665db99ddbcf1915a458019161b1ce6247bf6abfb36a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to malicious redirector infrastructure, specifically a lure for a 'free generator / game hack'. The document body contains text and a URL related to obtaining Robux for free, reinforcing the lure. While no scripts were directly extracted, the PDF structure and malicious link suggest an attempt to redirect the user to a site that may host further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-get-20210-robux-for-free-game-hack 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_off00003533.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3533 26176 bytes
SHA-256: b23847687ab6f363e0b18c3e7ffb567eeac5eff5dc1df48933d55cf8e9c2b53d
font_01_sfnt_off00007162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00007b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

Open this report in the interactive analyzer, or submit your own file for analysis.