Malicious PDF — malware analysis report

Static analysis result for SHA-256 3671bfae0170b1e6…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 16:55:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9b2069d9c557ef4ff803f78a0b7b6984 SHA-1: be1d702e8c5b2318f808a22b27896140be96f5e4 SHA-256: 3671bfae0170b1e6c72e0336cf45ef23b035fe9bac987c2bf2a47475b402823e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/431946152/roblox-dominus-free-game-hack'. This lure is designed to trick users into believing they can obtain free game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/431946152/roblox-dominus-free-game-hack In PDF document text
    • http://stitqi.ac.id/website//repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/robux-games_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/pokemon-go-free-coins-without-human-verification_GM1094591345.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-bedrock-edition-hacks_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_off00002dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC4 21616 bytes
SHA-256: 8f4dec863ca38f4f0a3f3959ad593f5b44b0f0e986c02e423332aea25d2b6915
font_01_sfnt_off00005d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 19340 bytes
SHA-256: 51aabce8a0fbddbcaac96e5367ec788fa01bdb555ce302519f38501c33e57caf

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