Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3091dd3d353530c…

MALICIOUS

PDF

48.4 KB Created: 2021-05-11 05:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: da55a63c10ee37a163875b7fa96c7d0c SHA-1: 63851cc802b8b2b8a8f0326b64ac2c5a1e578e01 SHA-256: b3091dd3d353530c4ba44241cf51d1d9c1df9e877a8f1631051ded4a06695aae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a game hack generator. The heuristic firings indicate a critical risk due to the malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the lure suggests a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/431946152/robux-online-game-hack In PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-coin_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B42 25020 bytes
SHA-256: f0d78aed924b8e0f927a54bfd98fcec1a2eda8ba2f89b3eff9fe1a5d7a3c35f4
font_01_sfnt_off00008450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8450 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E36 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B48 18044 bytes
SHA-256: 613688d39500d5b16bf64409f0aca6fe840d07506161475672c290022fb5aac0

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