Malicious PDF — malware analysis report

Static analysis result for SHA-256 beddd68bbb15c212…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 10:50:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ff19f0e18a3972db8586ba089a485fd6 SHA-1: 31e7c905bf2a9101eeaab4853d2c18e53ae45d0f SHA-256: beddd68bbb15c212e945d9327882361b2f05b92eb1675ced0881c766ad4b6acb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, masquerading as game hacks and generators. The primary lure is the URL http://netcdn.tw/app/406889139/coin-master-hack-version-download-2021-android-game-hack, which is associated with a 'free generator / game hack' lure. The document body and embedded URLs suggest a social engineering tactic to trick 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-hack-version-download-2021-android-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-robux-game-passes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/counter-blox-roblox-offensive-hack-script_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-trade-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/rbuxcheats-club-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-2021-no-scam_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-assassin-boxes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-today_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/codes-how-to-get-free-robux_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_off0000315a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x315A 22292 bytes
SHA-256: 2beec0ffe25b31b65ec12dafb5bb79f3bdd8ca01f9639477dd4af55f2b0f242d
font_01_sfnt_off000062bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BF 19120 bytes
SHA-256: 9c59e8689655b7c29414ac36463dda1b40bf56690c49a500d3d64997c009534a

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