Malicious PDF — malware analysis report

Static analysis result for SHA-256 3081a54af793a90d…

MALICIOUS

PDF

40.8 KB Created: 2021-06-07 08:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ee17b18a6b172dbce31c30c1390509bd SHA-1: 772b221d7ed8f70508f1260b1f7b54f12adbbc92 SHA-256: 3081a54af793a90d97e11e20d7b7eb71623c7257da96d71b939b208b742b7337
130 Risk Score

Malware Insights

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

The PDF contains a lure for a 'Roblox Walkspeed Hack' and includes a link to known malicious redirector infrastructure. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure and embedded links point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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.tw/app/431946152/roblox-walkspeed-hack-cheat-engine-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_004_off00003ae5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AE5 27660 bytes
SHA-256: 842e7c2a1957887a53d0628d477d23a2870952d8f68b92a8cdeddf1162ce7f8d
font_01_sfnt_off00007ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB0 19408 bytes
SHA-256: bcff35fe1d52414782f6d958ce6f46753c99ef4557686a1141d8c937908d694d

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