Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29bd4f0715e79f5…

MALICIOUS

PDF

46.3 KB Created: 2021-06-08 16:53:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91e0ab3f454a29dd8703fd6a93b89551 SHA-1: 57941fed29686899761838c575fdfeb9ef5bfb6d SHA-256: d29bd4f0715e79f56ed5c0638977dc15edc72c632ae11fbae7ff60a1f25ef298
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games like Roblox. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-roblox-password-with-robux-game-hack, which is flagged as a malicious redirector. The document body, though partially obfuscated, also contains this URL and other similar links, reinforcing the lure. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/free-roblox-password-with-robux-game-hack In PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-hub-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/pubg-uc-price-in-india_GM1330123889.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5134 26924 bytes
SHA-256: 18eddb73c3cd481c8d8c9139bce33d0732145f89cdd705422699ba95cd1b0a80
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 19396 bytes
SHA-256: 2d426853dac5183bd1466029e560eef74cf1b17d0a6be580ae7e996e5020d6cd

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