Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd773ec8b27528d1…

MALICIOUS

PDF

42.6 KB Created: 2021-05-18 01:17:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7097ec4e406b3ca49e124fd8235fb27 SHA-1: 7549093f7a1bf3188bdada1f992fb0a80962d0e9 SHA-256: dd773ec8b27528d15c8a66c5dbad40dcf3be62ff6de5720e9832ea8d8c3bdab4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a primary link identified as a malicious redirector. The document body and heuristic firings indicate a lure for game hacks or generators, suggesting the intent is to redirect users to potentially malicious content or downloads. No scripts were extracted, but 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/431946152/adopt-me-roblox-hacks-game-hack In PDF document text
    • https://www.knjizara-harfa.rs/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-earn-robux-on-roblox_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_off000047f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F9 24972 bytes
SHA-256: 958fe4c6eb96c5852380cb72b9aa9c6a55e4047790ffa162fa7ef6d3da51ec62
font_01_sfnt_off0000824b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 18832 bytes
SHA-256: 20cc3fc4f8bba0f9e43a0219006a1a5053a8a449a15fb7b1ac4ebea58af7d5b3

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