Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c06f78eb15eb05…

MALICIOUS

PDF

47.4 KB Created: 2021-06-08 10:30:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9599c243df0c0db5f6e8f6a6507813a4 SHA-1: 0957e4f07f6db4b35158218d4f027f98bf912e64 SHA-256: d5c06f78eb15eb05f33bde0e6fbe76774c2a7d2c53a924e81312be5e67db1804
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and free generators. The primary redirect URL, https://netcdn.tw/app/431946152/youtube-roblox-cheat-engine-arcane-adventures-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

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/youtube-roblox-cheat-engine-arcane-adventures-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/100-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-and-home-transfer_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/freecoins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-ps4-code-free_GM479516143.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_off00005142.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5142 30016 bytes
SHA-256: 79b28d0d107893620c0e8c8e4b6b001674aa06083089b15ebcb4c23741360600
font_01_sfnt_off000093ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93EA 19280 bytes
SHA-256: 0fd488f93fa82b57dae68b783af10f36d7d145d60beb4bd96cdccdd8980483f1

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