Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7ee5a492cd78f1…

MALICIOUS

PDF

42.8 KB Created: 2021-05-18 00:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9497d9470c1f9619b6375053329eee0e SHA-1: 1ba288439292b1db0446557ccd92f741e23b954e SHA-256: fe7ee5a492cd78f1adf722ee62a7f40a363b773eda7c0d38ff3a24079f726b00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual download button lure, suggesting an attempt to trick users into downloading malicious content. The primary URL, 'https://netcdn.xyz/app/431946152/free-robux-no-verification-no-survey-game-hack', is directly associated with the lure of free Robux, indicating a common phishing or scam tactic. While no scripts were explicitly extracted, the ML classifier's high confidence score and the presence of external URIs strongly suggest malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-no-verification-no-survey-game-hack In PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://daquagro.id/assets/vendor/ckfinder/userfiles/files/free-minecraft-com_GM479516143.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
stream_003_off00004976.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4976 25272 bytes
SHA-256: f9b66e8db2d15c7929b79ec17a9abe422fa05b01a8887c3133df48d7c8d1c50d
font_01_sfnt_off0000830b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 18892 bytes
SHA-256: 71091a6cc5ee2467f7d55b23aad8276d14a961c51a29e0f15aa3bcc69cbd56da

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