Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab80b2ed33c066ca…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 13:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c797f79f6af8cc93a5a5c91687b08a54 SHA-1: eaa5b85a2553a9ecca9052b5004a9d098ced59e8 SHA-256: ab80b2ed33c066ca3f2b98e6f79561c154d2f8a5be3d1927bdb2027fd406c466
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary link identified is https://netcdn.online/app/431946152/roblox-verification-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-verification-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pokemon-go-free-coin-promo-code_GM1094591345.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-coin-master-free_GM406889139.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
font_00_sfnt_off000050ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50EF 26196 bytes
SHA-256: 660d4dbd12593f39d0d15780a906adf7c18b89df3ccd8c180fe1eadb3113f637
font_01_sfnt_off00008cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC8 2984 bytes
SHA-256: 4adb8a917f49e7111d61a35b75f09762f191422f789e84659f5497848d60b01b
font_02_sfnt_off000096f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F5 18372 bytes
SHA-256: 8e16c624761c7815a00ee9013e3827e71f8aa93179f7b81ef6a1eeeaa97f0eaa

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