Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1f876bf7a3f555…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 07:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 816eade9c9480bcd424d1ec077bf2ca0 SHA-1: a72629db389160e9b52ff206aba373f3c4d92ef0 SHA-256: 5a1f876bf7a3f5559b81c7ab8d86dcf7ce40a022f5911e1681869dbd14733f8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body and embedded URLs suggest a lure for game-related cheats or hacks, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-free-download-pc-game-hack In PDF document text
    • https://mbbs.hr/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/auto-injector-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/cheats-to-get-cars-in-car-crashers-2-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-content-deleted-pants-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-50-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-delete-a-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-use-script-hacks-in-roblox_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
font_00_sfnt_off0000323b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323B 22700 bytes
SHA-256: d46f9c65d0ff1f8e6caba7251624679bae92382d79e3b585ad00bc9ad3bf1d86
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 18732 bytes
SHA-256: c019ed8ec51aec11cfd4435d098065b50ba7db79618555f513e678a421f3226a

Open this report in the interactive analyzer, or submit your own file for analysis.