Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e23d8a3d848881…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 11:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cf66b728ba9845abaa7f3dfa528fbffb SHA-1: a1df7041baf9d7d135914b6a3e38ee26b3b9797e SHA-256: f7e23d8a3d848881142eeff4d0d40e53372d08335a95c161dd6295aefafe6c12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The document body and embedded URLs suggest a phishing attempt related to popular online games like Roblox and Coin Master. The primary malicious URL identified is https://netcdn.xyz/app/431946152/watch-ads-for-robux-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/watch-ads-for-robux-game-hack In PDF document text
    • http://aessentia.com/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-game_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/how-to-get-free-robux-2021-easy_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_003_off0000482a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482A 25556 bytes
SHA-256: cdfd1c40a809e377a2e6df7033e4362cd0d3d37975264fc5190c7b00fba3644a
font_01_sfnt_off000083bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BF 18884 bytes
SHA-256: b326a3d2522df63c9b2d79b13b63d757e2bef45666281f059e1577b6e2c17aa3