Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54b663dec54c29b…

MALICIOUS

PDF

45.2 KB Created: 2021-05-15 12:04:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9812dcfe76b8731cdf958596c9121b2 SHA-1: 0ff98754234afecd02fe233b20554073a5e08f90 SHA-256: b54b663dec54c29b998d0aa453d87f70cfc108f7454a5250bd1555a21a5e4609
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, disguised as game hacks and free currency generators. The document body and embedded links suggest a lure for users interested in popular mobile games, likely leading to phishing or malware download pages. No scripts were extracted, but the presence of malicious redirector links and the ML classifier output strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/406889139/coin-master-free-chest-link-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/wurst-commands_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-and-coins-generator_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_003_off00004b32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B32 24960 bytes
SHA-256: 9f66a4df98907770af782fd965767e4d22af144a9837ada05d0dad347d1bc146
font_01_sfnt_off00008507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8507 2920 bytes
SHA-256: 03f8397bdf627aa5eb6acb233d3c5d547fa213245667a48a7f92829839117302
font_02_sfnt_off00008f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1E 18048 bytes
SHA-256: 122f27be2a08f4c3092db92943aab7c4ba84ce785d8466f49daf08684c118ae5

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