Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a2c6bd09666b67…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 16:21:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b12e5e1d74c0cd0ab8c959b7a20f6341 SHA-1: 6aa69b35ed2cee9d6001d068dfe37a6f95b08872 SHA-256: 53a2c6bd09666b671f7146cc267b91b81f125b429171c176b6bd65fff8e8c837
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to malicious redirector infrastructure. The primary malicious link identified is http://netcdn.co/app/431946152/no-verification-for-free-robux-game-hack, which is associated with known malicious redirector activity. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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.co/app/431946152/no-verification-for-free-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-hair-promo-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/no-survey-no-human-verification-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-sword-that-work-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-asasin-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/android-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-roblox-bobsponga_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_off00002fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4 22104 bytes
SHA-256: d3de9c1305da47f5f5e3fe7623f2651d067c7f23ebc652e3d98ad60f17c90fda
font_01_sfnt_off000060b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 19072 bytes
SHA-256: ed7243cc4f1bcdc1247db059248bc3bc09eea689d339630759500a9180fccb1b

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