Malicious PDF — malware analysis report

Static analysis result for SHA-256 e736b1e20b75cdfd…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 03:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 40115af907e990db09093a8deed36a70 SHA-1: c1208022959c1c59a038f22c51217325f219ccb8 SHA-256: e736b1e20b75cdfd5719f828d046252f6f7d851c51f77f3e510b4742c9a6d418
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that lead to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for free in-game items or currency, a common tactic for phishing or malware distribution. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-free-suit-not-deflaut-game-hack, which likely serves as a gateway to a further malicious payload.

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/roblox-free-suit-not-deflaut-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-a-hacker-off-your-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-apk-without-buying-it-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/best-free-minecraft-hacked-client_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_off00002f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F97 22220 bytes
SHA-256: 66e479354c090e229b9617e1d21405b00eb7e6c92d228962c63f645b2ff8f927
font_01_sfnt_off000060d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 19184 bytes
SHA-256: 50efb5d363bd15dd45e3f8b9771537082d6163873b7244be26e7c5a4ff221a6c

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