Malicious PDF — malware analysis report

Static analysis result for SHA-256 e831be59e5afb907…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 14:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2975f3f626258756ff63b330b1f6094f SHA-1: 0d86dfb323db33b6e16cd8ebd173f2696f531e19 SHA-256: e831be59e5afb9077e57e67a169acd44e54561bf59d8abd353177134cca1b648
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious websites, masquerading as game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures strongly suggest an attempt to direct users to malicious content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/roblox-adopt-me-hack-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF0 25912 bytes
SHA-256: 15dc8817e6ed3690f0b5b3ef84be49f847dba599e1e4eb8c629be0120343bc02
font_01_sfnt_off00008b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000981d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981D 18832 bytes
SHA-256: 4d658ccafa0b893d8d7fed2f8c747f895118d61cffd562c1959dd86f9709654a

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