Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d37fbeb27339fa4…

MALICIOUS

PDF

44.6 KB Created: 2021-05-15 06:50:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 860ed6c4df7855715e7c3b2987ef7827 SHA-1: fd6b4b9c407c364811e8ccec32feb10a9b4c0198 SHA-256: 6d37fbeb27339fa494f03d8d7a414005c57246fa04945a4b64c3a3ed0c17b92a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one specifically advertised as a 'free generator / game hack'. The document body and embedded artifacts suggest a lure for game-related cheats or currency, aiming to redirect users to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/androeed-ru-minecraft-game-hack In PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-free-spins-promo-code_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_off0000495a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495A 25456 bytes
SHA-256: 6aded534ee4d3f14fff0413b52e1cf2206d1453b6ddd7d1cd1e4de9b073e3bc3
font_01_sfnt_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB9 18024 bytes
SHA-256: d77f23eb406fbdbcc7d1895b5a23e167f495e6594edd92a4e1ae302dec94c325

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