Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedccb083a167052…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 21:23:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 58e22ece0898581450267de97157ee81 SHA-1: 86c5209a3dccd3c7d0fedabea910533d5cf57c4b SHA-256: fedccb083a167052f7f855b471e5f7662ff88e061255f8bb98e655698ea7283f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to sites offering game hacks and free currency, a common lure for phishing or malware distribution. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The presence of a password-protected archive lure further indicates a multi-stage attack designed to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/info-roblox-com-robux-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/mad-city-cheat-codes-season-2-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-free-no-virus_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_off00003282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3282 22316 bytes
SHA-256: 6625ffee85f2925c3f42b50658177931f846b8b45027af22d00154bd01abd8df
font_01_sfnt_off00006400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 18884 bytes
SHA-256: 33869e0793667af56f7d6ba87793124f619ba1ae35730a4dd1e79e07104d3564

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