Malicious PDF — malware analysis report

Static analysis result for SHA-256 c602ce7709056854…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 19:58:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9a630a0f8414b4bb5706a6bd11c95c4a SHA-1: d670cf6cae1e6496a6b7330beb91e497a631ed26 SHA-256: c602ce7709056854cbe364a2b571ce9f4074971453344086677d0333ee0b5c78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The primary embedded URL, http://netcdn.tw/app/406889139/free-spins-coin-master-app-game-hack, is likely a redirector to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting a compromised site, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spins-coin-master-app-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-script-injector-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/is-it-possible-to-get-banned-for-cheating-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/rbx-gg-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/game-hack-36-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-insect-no-waiting_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-website_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_off00003560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3560 22976 bytes
SHA-256: db57b2c8fb36a8278dd30c90f939e82291a6916246abd42edc8dfdac3f03ba92
font_01_sfnt_off0000692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 18176 bytes
SHA-256: e95ed07f9a3392ac9f393b6d3cafc9f79ae200f6e0f71949f87052ae7f0648e8

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