Malicious PDF — malware analysis report

Static analysis result for SHA-256 315eb4bed21c5e29…

MALICIOUS

PDF

45.7 KB Created: 2021-05-17 12:39:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b1bcb024b12f2af44ff8430d85380b3 SHA-1: 476a6c84628408206ca36964275ab60cac34cce8 SHA-256: 315eb4bed21c5e29e5dfb445f6c0850899a9f8fd1961024edac36433a53a66f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising free game currency and hacks. These links likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering lure designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/game-give-free-robux-game-hack In PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-200-spin-link_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C21 28940 bytes
SHA-256: 2f922a239b2c94755bc3720f48b063fc0c71db1de1ba34d0d5647a69a8ee0fae
font_01_sfnt_off00008f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 18736 bytes
SHA-256: 457049c0c0b067ea8a2ccaf5c24f39a354f8c872058b648fa686429afe9091ea

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