Malicious PDF — malware analysis report

Static analysis result for SHA-256 366814123fe02793…

MALICIOUS

PDF

30.2 KB Created: 2021-07-19 07:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2a4b2759532835c8738ed336eaa13a31 SHA-1: 8e176ed578c1574f44de567e426b15ff45164cc5 SHA-256: 366814123fe02793659ecd5bb043482f1a83b8a0225ce210abff1650470ce8c6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a malicious redirector lure, specifically advertising a 'free generator / game hack'. The embedded URL, http://netcdn.tw/app/479516143/play-minecraft-for-free-game-hack, is identified as malicious infrastructure. The document body also contains a prominent call to action to 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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 http://netcdn.tw/app/479516143/play-minecraft-for-free-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
font_00_sfnt_off000024f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F9 21912 bytes
SHA-256: 53815f4a570f70e202975dc85ac2f423088442bcde3383c3a5e97dc0d5691a0b
font_01_sfnt_off0000552b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x552B 18116 bytes
SHA-256: 58506b39f0592aa293a22e76cdd5d8324130a94bf097dc81d26ff216ea8060f4