Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18e27b8784e40e9…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 10:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5d62c9fe9b308209ffc8673cca03642e SHA-1: f95fbfe3a99d7b222678733c6911bdf55bc6155c SHA-256: d18e27b8784e40e94498fc81b8427fe161af009703dd39b1367e346b77371745
160 Risk Score

Malware Insights

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

This PDF file contains a lure for free game currency and hacks, directing users to a malicious URL. The URL is associated with known malicious redirector infrastructure and is likely used to deliver a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/lucky-patcher-coin-master-hack-game-hack In PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/hack-robux_GM431946152.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_003_off00004b26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B26 24236 bytes
SHA-256: 446f41c74df255917e45e554c172e9dc2138683d238164eb0e9f0598ff119d49
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 18356 bytes
SHA-256: 8ec65d0f5dc2d155408c54e8fca99d6e5dff9ed808b7c9158d2ba030e67357e0

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