Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f5ff91f6c69f4d…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 01:54:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 100a1d7148b63aeb08275d1db0839404 SHA-1: ceaacdaf9ac0d720842e073bb25a264f1f9f282c SHA-256: c2f5ff91f6c69f4d212254e3921afddc3879d84787cf93ecfa42683b6cd56818
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically luring users with 'game hack' and 'free generator' themes. The embedded URL, https://netcdn.tw/app/431946152/hack-dragon-ball-super-2-roblox-game-hack, is identified as a known malicious redirector. While no scripts were directly extracted, the PDF structure and the nature of the lure suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/hack-dragon-ball-super-2-roblox-game-hack In PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-spins_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005235.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5235 25028 bytes
SHA-256: 4ab18bf9b16ad5a5122b34295c5e4085c8b4723e93552fda7a0e30ab5e2459b7
font_01_sfnt_off00008b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B92 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9544 19076 bytes
SHA-256: c015b933a32d180df2a222102a029fcfba6308ec4eb0a4361c94de7cb672a2f9

Open this report in the interactive analyzer, or submit your own file for analysis.