Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cea162641e7c2ea…

MALICIOUS

PDF

34.3 KB Created: 2021-07-20 20:05:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c791d8250d2b7989c72adfc93d9dae2f SHA-1: d4e65197e2c140c6c80521112be0c3739f76d917 SHA-256: 0cea162641e7c2ea4a54e17332f3ab892e594f48c7b051be4111e7eb77222483
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks and generators. The document body explicitly contains the URL http://netcdn.tw/app/479516143/minecraft-mods-download-free-game-hack, which is flagged as a malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/minecraft-mods-download-free-game-hack In PDF document text
    • http://librarysenior.com/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3114 22872 bytes
SHA-256: d3847f26e10eef471deb13a38029a8300937fb0f34576b0e403a4f50c0e9a148
font_01_sfnt_off0000645e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 18292 bytes
SHA-256: cdbcc94192cea0c1a32d76b4e8648406db092070658ebd9590606dd52a123660

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