Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83b15ffc57700af…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 01:16:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e6d7ce5b0b58e6836729d329e251301f SHA-1: 195b297d0328312a60b05c1de3d5ee050fa9bd4e SHA-256: c83b15ffc57700af1e5668e377deaf6c22189b57b7398b629e2fd25dead54682
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' for platforms like Roblox. The document body and embedded URLs strongly suggest a lure to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/robux-at-roblox-tody-for-free-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-many-warning-for-hacking-do-you-get-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/generator-free-robux-facil_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524C 26908 bytes
SHA-256: e130e93362e9bb2668ea787004674f8f66534bd21013c88222f1b6d30b2fd672
font_01_sfnt_off0000902c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 19796 bytes
SHA-256: 601c55c26d03c0980c155badf945355e91383d01673ded88b3d99a9499cc7d98

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