Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93ae3688cf5acd0…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 00:34:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f0a062dc38b45bfd839083a9f3d24760 SHA-1: bf6ccad8ae150410581d7fe983b0e91eb2c5c7fe SHA-256: a93ae3688cf5acd02a12e178920888de0e3fb196823d74559fa7056226e58562
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-stuff-in-roblox-ios-game-hack. This lure is designed to trick users into believing they can obtain free items or hacks for games like Roblox. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/free-stuff-in-roblox-ios-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-terminal-railway-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-personal-server-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-rocitizens-money-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/watch-a-video-for-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/generator-robux-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-accounts-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/kuso-ico-roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-with-crosh_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-bloxburg-free-play_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coins-on-coin-master_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
font_00_sfnt_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 22092 bytes
SHA-256: e06a8889c82099f6732fc1318ab411e30d8fa5c35dd392b7d45909d8a0ba6fc9
font_01_sfnt_off00005f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 18896 bytes
SHA-256: 0a024faa264512cb679e296457c8fab80a625e1d6bedc7e9534fe611bcf0ebc7

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