Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb6eaca5fc6a0df…

MALICIOUS

PDF

37.4 KB Created: 2021-05-15 04:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 30d252016ccb212d7095547d77b969f3 SHA-1: b8bb1cc83edbc96c0db55b20e7ba54287716b537 SHA-256: adb6eaca5fc6a0df6b9261615f819859fcf64c3f8c51add3dff89183b36d436e
130 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector, masquerading as a 'free Robux generator' or 'game hack'. The document body explicitly mentions 'Free Robux No Downloading Apps' and includes a call to action to access a generator, indicating a phishing or scam attempt. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • 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.
  • 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/free-robux-no-downloading-apps-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A5 26064 bytes
SHA-256: 30ab12b51f9ae8dcae39efbbc8b0742add836e1baf28d7faed9281aa2a63b35a
font_01_sfnt_off00006d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4C 19404 bytes
SHA-256: 49b6dfa9b56ae39db803e39cb2f1ecc2093e69bc279e239e32c5359198169209

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