Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a86a4dc25022647…

MALICIOUS

PDF

50.1 KB Created: 2021-06-03 14:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ccbb8bddf3773a5e97b56bd6b344a2e SHA-1: 1abeed30b96a93eac196d3a471831353b836bcc7 SHA-256: 6a86a4dc2502264762faf5401e3c554f09d4bd198e2b0c82d98417d34bddcd8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link to a "Coin Master Hack" generator, which is a known lure for phishing and scamming users. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious infrastructure, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

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-hack-without-verification-code-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005314.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5314 25300 bytes
SHA-256: 848e8704a0dd055153e2aa5039c7cde15633c11748fd8fd780b18f889a6512c4
font_01_sfnt_off00008bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD0 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9582 18528 bytes
SHA-256: 73698aa0d04f612b8edcfc98417ef0f8be184b3e572c91f5f0109cbf791ef469
font_03_sfnt_off0000b851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB851 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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