Malicious PDF — malware analysis report

Static analysis result for SHA-256 401aa06449a58b93…

MALICIOUS

PDF

45.2 KB Created: 2021-05-16 19:06:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3f0d54a8b4434b5242d99a256097607 SHA-1: dcb6fc7fe00441e2efe93b20b183942eed50cc1c SHA-256: 401aa06449a58b932360828cc8b47371520e9838fb8bd42147977154d4631e2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. The ML classifier also flagged this PDF as malicious. The primary goal appears to be redirecting users to potentially harmful websites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/roblox-promo-codes-free-robux-game-hack In PDF document text
    • http://altc.de/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://altc.de/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://altc.de/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://altc.de/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator-no-verification-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A1 25176 bytes
SHA-256: aff1a353ada38335371dfaa60f9619a5724b4d32267a76ba9e40ce4410cb42a6
font_01_sfnt_off00008344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00008cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFB 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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