Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8b69550c6d3084…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 18:39:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 3baacfbee76700d878223a66cf96948b SHA-1: 2ce245d9bc294eaf0633fbb3e7fb0a549a4bd6d9 SHA-256: aa8b69550c6d3084f88e5fafdb0083cd4fa0f0685b73cc39c1fc63489bc78c85
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/claim-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/robux-only_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-spam_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-ingame-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pokemon-go-free-100-iv-coordinates_GM1094591345.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/cheats-for-city-architect-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-roblox-robux-tuto_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-lumber-tycoon-2-money-hack-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/no-verification-for-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/comment-hacker-roblox-android_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-aesthetic-clothes-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_off00002db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB1 22720 bytes
SHA-256: 47ac5dce0026f6197365a7f3152f01ee41b25dd9fa15d34d08b81fd407d3e818
font_01_sfnt_off00006086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 19008 bytes
SHA-256: 2d699b59fae2859d2e8e824a2ab2ebb8118e4eb1d61ccb84239df2816aec8c92