Malicious PDF — malware analysis report

Static analysis result for SHA-256 982653163aaae903…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 07:33:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c43eae0cfe679d9f58a5fc22730620c0 SHA-1: 382e2446fb329ae686700a0586b7aab2d84eb935 SHA-256: 982653163aaae903b19d8c3070ba15c3de4406aecb45b3f0a4115e4cdc55209a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to potentially malicious infrastructure, specifically advertising 'free generator / game hack' lures for popular games. The ML classifier strongly flagged this PDF as malicious. The embedded links likely serve as a lure to download further malware or phish for credentials.

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/406889139/coin-master-free-spins-2021-app-download-game-hack In PDF document text
    • https://www.polyfin.de/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/roblox-top_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/roblox-scam_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-robux-just-enter-username_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
stream_003_off0000486a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486A 23940 bytes
SHA-256: b278d2aab92c0f5944c01a7906878f1378415fcf2581dd4b0f774bbaaa53ce7a
font_01_sfnt_off00007e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7B 18868 bytes
SHA-256: b751cdaf37495e2cbea790aaa61ad6b08870d96184a8696588416af24de27b3d