Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dc385d868beab7…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 23:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8ebee9c0800733813d0d076f8b18e885 SHA-1: 2ab937b0d449b8632dc7a3f7a3409db6a5d1ca65 SHA-256: 14dc385d868beab7bc0c94967bc3e787ee355eaff5a8d9fb851932cb83172f04
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/link-for-free-coins-in-coin-master-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, designed to trick users into clicking these links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/link-for-free-coins-in-coin-master-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-simulator-free-model_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/cheat-roblox-pass-thought-the-wall_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hack-coin-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hacking-games-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hack-to-beome-supertall-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-key_GM431946152.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_002_off0000327b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327B 23568 bytes
SHA-256: 7c75c88c2ceb1b5bec61c57cd236c331db5beaf51d06f4532040911c97ea69f1
font_01_sfnt_off000067c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C4 18168 bytes
SHA-256: a48da4cfe55a624bb9e3a1d72da27453416af78d7800a5ce358445dfb8f01111

Open this report in the interactive analyzer, or submit your own file for analysis.