Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6578d41046f056…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 14:45:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 50532a1dcf287479f7dfd369cf84e2ea SHA-1: 78c93d50e23bb052c3fce72f43a06411ba30d3a1 SHA-256: da6578d41046f056b8bbd19e584373855fd13236cf28526063ddf4c7017e53f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically targeting users interested in game hacks and generators. The embedded URL leads to a known malicious redirector, which likely serves as a lure for further malicious activity. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to drive users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-play-on-roblox-game-hack In PDF document text
    • http://magnipsor.su/images/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-codes-cheats_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-bubble-gum-simulator-free-pets_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-daily-bonus_GM406889139.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_004_off000052d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D1 25828 bytes
SHA-256: dc28ec49b3d6b6da51e6f209da526a9a18bca040ef6f97b165c5c563928f9265
font_01_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8B 18512 bytes
SHA-256: 5df47e79077edd27be348fc35031f4090c755febbeea21ea28a08b126b922ca7

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