Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5a51f3cd4c7b33…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 00:36:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ed09c3aae2621b21daa5ff53413c87cf SHA-1: ac9417fe8e28ab6da98358b73af8f2ca0d1352f8 SHA-256: 9b5a51f3cd4c7b333d349152361afbd9fcbee26d3d5841665bad2109488c42e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector, http://netcdn.co/app/431946152/how-to-roblox-speed-hack-game-hack, disguised as game hacks and free item generators. The document body and embedded URLs suggest a lure for users seeking cheats or exploits for popular games. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious infrastructure that likely serves further payloads or phishing content.

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/how-to-roblox-speed-hack-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/roblox-invincibility-cheat_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-games-without-signing-in_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-exploits-hacks-arsenal_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-headset-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-venerator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-promo-codes-valid-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-ninja-legends-hack-to-one-tap-boss_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-sans-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/no-human-verification-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 22792 bytes
SHA-256: fb5ef2344856766e6c72350de6bba7b7f1488eabe70c7a6d7e2d9aad64511fb8
font_01_sfnt_off000062bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 19168 bytes
SHA-256: ebb7b5d3562a2368f4d3f4c7e9df0b22aeacdc2e27d285088a23c9e61ceb20de

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