Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98426a86919509c…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 04:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e548d1a5d869eaf65da73e02d2cc6783 SHA-1: 92ec6de8e35925e28ee6e582f6f5a8fb8b791897 SHA-256: d98426a86919509c688c3ee59f8d56256bf116940a0ad9188f92507ecbbe79e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a 'Coin Master Hack Apk' lure, indicating a social engineering attempt to trick users into downloading potentially unwanted or malicious software. The presence of a malicious redirector link and the ML classifier's high confidence score support this assessment. No scripts were extracted, but the document structure and embedded URLs suggest a phishing or scam campaign.

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-hack-apk-2021-game-hack In PDF document text
    • http://stitchingart.com/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/robux-money_GM431946152.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
stream_003_off00004a7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7D 25124 bytes
SHA-256: ea22eb95ea6c0e53d4898b908a05949102bef4930dba3522574728288127f253
font_01_sfnt_off00008387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 18296 bytes
SHA-256: bf349ca5353405da50dde13ab4b8c776ba4b0a629ab8eb4a4600605684f4a994

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