Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc8b67511404c3f…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 03:54:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 12d8d4325f148ba4fc6ed845898057cf SHA-1: 7ca53f4e3097328dcf1a7c2befc845adad863f9e SHA-256: ddc8b67511404c3fdf1e24962f3a52ed4bc1f4ec95609f9fc500dc66761e6188
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The presence of embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-hack-tool-access-online-generator-game-hack In PDF document text
    • https://tckontrola.hr/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/2021-free-spins-coin-master_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_off00004963.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4963 27744 bytes
SHA-256: b9300b70a7a4f8334ebc3c9e058d30b5d01820c82700b87d42da392812a04b1e
font_01_sfnt_off00008687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000090a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A1 17788 bytes
SHA-256: 33ab51800a62a2450932d388ea047aefe8ef17548780c20cda013d20edb28882

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