Malicious PDF — malware analysis report

Static analysis result for SHA-256 1477349c59b58250…

MALICIOUS

PDF

33.5 KB Created: 2021-07-21 02:20:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ec996662aa147ae82b6569abe0302d36 SHA-1: f0658adf662af90cd1fec49f45030407a8418ebf SHA-256: 1477349c59b58250c5f4fc16019de631a4aff26c2cd282a3c7a1ef6b79189a0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' or free item generators. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/classic-minecraft-net-hacks-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn 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_off000030e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8 22324 bytes
SHA-256: 6c076e9ea25c3de5ec3bd582aac08998a9eee36a83d3d4f550fccfb37c68c079
font_01_sfnt_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 17812 bytes
SHA-256: 06eb0692cb0ff670c8084f221f19fc536b6b0c4a84b00058b05a05adc7fae17c

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