Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bb027abfcbd5c9…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 03:13:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 27ef39b95589c99401953d84d7370ecc SHA-1: 544eb3965dcff60b9311d9d38bcb92234ebf115b SHA-256: 26bb027abfcbd5c944d70a90944e2500c1b4d26aaa2d7e04f0fc139f88a765c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack Tool'. The document body and embedded heuristics confirm the intent to lure users into clicking these links, likely to download further malware or engage in scams. No scripts were extracted, but the presence of embedded URLs and redirector links strongly suggests a malicious intent.

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-tool-v1-9-download-free-game-hack In PDF document text
    • http://www.alpaca-buitensport.nl/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-hack-in-roblox-prison-life_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_off00004854.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4854 24980 bytes
SHA-256: dd9b37db8db0efa87c3a338cb1499fee8258be9001f670c5194036e206fc14b5
font_01_sfnt_off00008097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 18864 bytes
SHA-256: f6546c931e30ebe5b0f44735796ae8f725f630439fc19eae70f9e7cc234a2321

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