Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a66cdee553e15f5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 07:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c223da078512e5ca9f9b2638d22dd4ed SHA-1: 8aa57780b79df128c31dcb19aea6aeb12b36dc55 SHA-256: 9a66cdee553e15f5e32abcb3eac9791bdfb0523cb64021384032c1130384e774
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular mobile games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-link-haktuts-hacking-news-game-hack. This indicates a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/coin-master-free-spin-and-coin-link-haktuts-hacking-news-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-wings-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-cheat-engine-681-scripts_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-tix-roblox-pbb_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/conscle-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-restaurant-tycoon-diamond-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-tiktok-followers-2021_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/best-free-minecraft-texture-packs_GM479516143.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
font_00_sfnt_off00003106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3106 23148 bytes
SHA-256: cd9db46265e2727a18f63e79be69b918653110e03f90e7a05acc084dc2bec499
font_01_sfnt_off00006516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 18824 bytes
SHA-256: 028a7533a0cffe48b6a3e73a5ec4a7571f128d14e74948211d37bb39bd0384d4

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