Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93658411875322f…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 02:53:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7172e3e029660256171595ab2f61360f SHA-1: b7f0b242c96f8b63d07d5b218d1bb668aafd19fd SHA-256: c93658411875322f6c6d7272716a8c862f5c0689f9187b9bece0465b1eed42cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, including a primary redirector at http://netcdn.co/app/431946152/free-robux-no-verification-and-no-survey-game-hack, which is flagged as malicious. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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.co/app/431946152/free-robux-no-verification-and-no-survey-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accouts-that-work_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accounts-2021-july_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheat-codes-for-money-xbox-one_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/best-roblox-hack-api_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-do-people-hack-roblox-servers_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cheat-engine-roblox-tricks_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-no-survey-legit_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-coins_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_off00002e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E21 22120 bytes
SHA-256: eeee56844b655649e704adfe5766fc9c957eadb54a81ac356350d871ef550b9a
font_01_sfnt_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 19544 bytes
SHA-256: c8377fa91689b850af39044a9c75af94043fbd91a2b75b1f99013ee5f6ef7f6f

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