Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1734134b585d57…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 18:35:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3106408f8d88a25b47f1c543dcd2845b SHA-1: db3faf7e218d6308a8153eecb31e712a32230688 SHA-256: cc1734134b585d576de68fabf39e435f5e278e6e446258b86270cbc872d458c8
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'Coin Master Fun Hack' and other game-related cheats. The primary link, http://netcdn.tw/app/406889139/coin-master-fun-hack-game-hack, is identified as a malicious redirector. The presence of a visual download button lure further supports the malicious intent of directing users to download potentially harmful content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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.tw/app/406889139/coin-master-fun-hack-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/mad-city-script-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/b-tool-hack-in-roblox-link-jailbreak-heli-bomb_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/hack-roblox-lumber-tycoon-2-btools_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/robloxain-roblox-hacks-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-build-a-boat-for-treasure-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-waiting-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-free-robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-noclip-download-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/juego-de-hackear-ordenadores-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-so-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/2021-roblox-hack-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-credit-card-number_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
font_00_sfnt_off00003259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3259 23476 bytes
SHA-256: d9151966836ee35414533f8085c7e615147e2470a975d41ddb5dc0956a507237
font_01_sfnt_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 18308 bytes
SHA-256: ec1c450ed3203d9d96c34464c72d7866981f6f15754b5123fb1f2af95b3a0b29

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