Malicious PDF — malware analysis report

Static analysis result for SHA-256 264cd39799aabd74…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 14:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33dde68d3411d068e6eaa0330cd966ef SHA-1: 2b7f22826e6563687499e4b402ac67e103dfec8d SHA-256: 264cd39799aabd74146b601a40b02e9f236a836fc9b1c9334a48889b5a5e211d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'Coin Master' cheats and hacks. The primary lure URL is https://netcdn.online/app/406889139/coin-master-cheats-2021-game-hack, which is associated with malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to this lure and the authoring application, suggesting a deliberate attempt to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the lure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/coin-master-cheats-2021-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-fast-org_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_004_off00004f29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F29 24324 bytes
SHA-256: adee33637f0d66493fafd0ff257a5a0b8ba05b43409f4019a9c26131ce2a94a1
font_01_sfnt_off0000862c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862C 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDF 18112 bytes
SHA-256: 8fd2be34c5ae6d36bafabdc0d90731bcc2dba590b40522d9b75e2e7b006908cc

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