Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad76f0638061af6…

MALICIOUS

PDF

49.4 KB Created: 2021-05-15 14:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bce34349dd291274b058aa2c00e5011f SHA-1: 076dced9fffc6476b1ac63bc73f1dc3d8942911d SHA-256: 8ad76f0638061af6cfeacb76c3d2b6115154448affd1a0660639e259a0e46b6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL and text that lures users with promises of free Robux, a virtual currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it is designed to download a second-stage payload. No scripts were extracted, but the overall pattern indicates a phishing or social engineering attempt.

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/431946152/free-robux-no-verify-game-hack In PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/sites-to-get-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_off00004af5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF5 26412 bytes
SHA-256: fb7d16b8f95648d407466ed6183427be0ffcb62db2b9b70f2b4268c0ef738942
font_01_sfnt_off00008788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9134 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDC 18448 bytes
SHA-256: c82a2e535d1b02ce633786be567827726fc21df48f71ae9cb05a1d9866072f5e

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