Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e3754d6be87a49…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 08:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f684bd332cff5d3b21e9684a83de1b59 SHA-1: 8f0621626de3f0e03cb819bad57eaa1a4ded3ed9 SHA-256: d7e3754d6be87a498e28fd4fe663057c5d2b751aaf2e507af4d0c47719863873
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'game hack' and 'free spins', aligning with the heuristic findings. The primary malicious link identified is https://netcdn.xyz/app/406889139/blogger-coin-master-free-spins-game-hack, which likely serves as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/blogger-coin-master-free-spins-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/google-moon-active_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-top_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B42 24596 bytes
SHA-256: 978e78cd7d560960028d6014244fafa81487712cd8d748cf007b04fdff6019b4
font_01_sfnt_off0000829b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829B 18464 bytes
SHA-256: 0911799b9aa5b6ecf8f75e1ae71094da345a4ed5579c86b7800e8f9c3f9f610d

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