Malicious PDF — malware analysis report

Static analysis result for SHA-256 647663539b98f7be…

MALICIOUS

PDF

47.8 KB Created: 2021-05-14 13:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c94085e824c932b034c7e34516d6e93b SHA-1: 1c9b372e14c28c2e4ba4be4cdcebae93100670a5 SHA-256: 647663539b98f7be85c6a348f554f543945a933c7b61770fd1ea9598f462a5c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, such as Robux and Coin Master spins. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates these URLs lead to known malicious infrastructure. The document body and embedded links are designed to trick users into clicking through to these malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/how-to-get-free-robux-easy-no-download-game-hack In PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/coin-master-strategy_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancisveterinary.com/uploads/files/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D09 26828 bytes
SHA-256: 4fb04107661c8a19d064216a50f0583c1dc24fe5bb0c73674a5b45f842665622
font_01_sfnt_off0000894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000095f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F2 19108 bytes
SHA-256: 7bc61c49a0b734df4d56b9cb8c894117daf111bfa68c773dcc76edca8f070452