Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6bcfefe58227a3…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 11:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b02cc2ccadaf156ef44dec77fb9304fe SHA-1: d6af555a2a5fba0bd7e3c6d612611497a6d56a35 SHA-256: ac6bcfefe58227a3233114fb515747e33e5eb79fb66baf695b0c4d3bc2301535
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to known malicious redirectors, disguised as generators for in-game currency. The document body and embedded links explicitly mention 'free Robux' and 'game hacks', indicating a phishing or scam lure. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely to a site that would then attempt further malicious actions.

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/free-robux-generator-2021-no-survey-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spin-hack-apk_GM406889139.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_off00004848.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4848 25052 bytes
SHA-256: c909fb65ac8c36781286e78d957f9d71ae78990bb865bef665e9a9383ae011f4
font_01_sfnt_off00008238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 19044 bytes
SHA-256: 6a3befe032ce85dfab02daa9542f37d979e32cd852f1a969db8cf02301732b57

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