Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb052de2aef10c3…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 07:54:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffb94b8fca57b92729371a9d91d95795 SHA-1: a6b15bd77c6ff332cae3b255624ea07f58b8df86 SHA-256: abb052de2aef10c30c96a38eead0ea6d1599180fbab36f95d22dd763749318b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirectors, specifically advertising a "free generator / game hack" for Coin Master. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-coin-hack-game-hack. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-coin-hack-game-hack In PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/flame-gg-free-robux_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_004_off00004eed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EED 25568 bytes
SHA-256: 3b251d137448f02b7a6904af7fd7258686981fe9c1cc268736f54202f458fe45
font_01_sfnt_off0000891e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891E 17880 bytes
SHA-256: 9d1f455011f0aa7862855f259ab9ea2efa3be9ec050c3ec97e4c793879e57b5c

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