Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b9cacdc275ab1b…

MALICIOUS

PDF

48.7 KB Created: 2021-05-16 19:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dbd874db4e09a5319f0b5c9c8a6b4ae8 SHA-1: f8555a9bdfef4a7f03e1b9ab6f18262180353110 SHA-256: 55b9cacdc275ab1b6ad343ea3619dc22da73b4baf17326dbb15c546f759760b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as "free generator / game hack" lures. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure. The presence of these malicious links and the nature of the lures strongly suggest a phishing or scamming attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/minecraft-xbox-360-free-game-hack In PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/robux-game_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2B 25464 bytes
SHA-256: 4d56011c4ed3b6fdab750f64050da8aec7fa71664b2b53d9e14ff55a1c91498a
font_01_sfnt_off00008599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8599 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off00008fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FED 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off000099fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99FD 18820 bytes
SHA-256: 548eb6d6d76b0782fa129353e40cf244a6945086c4e3cc69bdc72bd715347561

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