Malicious PDF — malware analysis report

Static analysis result for SHA-256 207cfeeb5ee8ab30…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 04:15:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b7e3df95cd70eb1ef02256c468565aff SHA-1: edcccc257f11cf2ebe8ef22241c344c5ceeaa5ba SHA-256: 207cfeeb5ee8ab30926cd4800b72ed2797fc40ced6930fcd3c64a4ec503ba0e7
160 Risk Score

Malware Insights

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

The PDF document contains multiple links pointing to a malicious redirector infrastructure, which is designed to lure users into clicking on a "free generator / game hack" link. The document body and heuristics indicate a social engineering tactic to trick users into visiting a site promising free Robux, likely leading to further malicious activity or scams. No scripts were extracted, but the embedded URLs and redirector activity are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-for-kids-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-games-for-girls-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/ww-robux_GM431946152.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
stream_004_off000052a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A5 24536 bytes
SHA-256: 32201ee618ac3378a65e6aff68d1686eec83ee34b0eebc31472af72003c269eb
font_01_sfnt_off00008afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFA 18308 bytes
SHA-256: 763c1f2cd60606b291f89f2a80f52d083a3bf80be883c0f2186ef0e0ffb8dff5

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