Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e103bcffbc338e…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 07:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 54a91111bec2b17ba9f93a06097cb0ba SHA-1: 572058a2d38ad4f3d2bbad572d475db450e82b19 SHA-256: a2e103bcffbc338e4248fd4d8d7f34298e81b4225a8a797eaf2ea9291a5729db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' and 'generator' themes, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

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/how-to-hack-coin-master-spin-game-hack In PDF document text
    • http://sealysports.com/images/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://sealysports.com/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://sealysports.com/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sealysports.com/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://sealysports.com/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://sealysports.com/images/free-robux-for-kids_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_off00004835.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4835 25124 bytes
SHA-256: 020426ce4648d4094f3aaa28d3e9e0a04aa5826894be5e7b8e83a92a23b7980b
font_01_sfnt_off000081ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CA 18056 bytes
SHA-256: 5e82f79f4c6ef45b1ad688a3ba1018d76c0b9c4c9956dd607c838570fa3f70c1

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