Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd55ceaf20bcf7e…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 08:56:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f047b736cca8734cf20a93138c0ab80e SHA-1: 6bd98bfd419e59e9eb2352f32ee260f37af2b2d7 SHA-256: 3cd55ceaf20bcf7eb351ec5c10a75bdd53fbdd86722d51335ce205926e913716
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with this finding. The primary malicious URL identified is https://netcdn.online/app/406889139/free-coins-and-spins-in-coin-master-game-hack, which is likely intended to lead users to a compromised site or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/free-coins-and-spins-in-coin-master-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/tiktok-free-speech_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-admin-hack_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000505c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505C 25384 bytes
SHA-256: 140b372b1236b07889631b28faa4f1bfba4a4e2475fbebda84e6efa33282930c
font_01_sfnt_off00008b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7D 19212 bytes
SHA-256: 05bb786c6fede880338aa357916114cbc0f39f36dd6270cd8278a050c419cf0c

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