Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bfe659ef1aad20…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 10:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1da713317a0fc42a8678b8b929003f4a SHA-1: a7c23e0fb080d2653955c95bf9af5dc21ea72468 SHA-256: 08bfe659ef1aad204769e29ed0ecee193381e827b5a2c28063f7c0c63f8d8f71
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and currency generators. The document body and heuristics indicate a lure designed to trick users into visiting these sites, likely as part of a phishing or malware distribution scheme. The presence of a password-protected archive lure suggests an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-games-that-give-you-free-robux-game-hack In PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.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
stream_004_off000053d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D6 25440 bytes
SHA-256: ab39e26c609f8f71b426d939268dfaaf8d101ec6fedde5a095b1e67b0d638dec
font_01_sfnt_off00008f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F17 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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