Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cff1226d38e619…

MALICIOUS

PDF

45.2 KB Created: 2021-05-17 02:55:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5e93c982108aa85eb739815e8101a745 SHA-1: ccd62aa2752350a0b8c0685fd4e8d70c1baa8e94 SHA-256: f6cff1226d38e619be0a8831ad5c9a74a6e40a8645923da5ef3e5e8bddab9075
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors disguised as game hack generators, specifically for Coin Master. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or downloads, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-cheats-free-spins-game-hack In PDF document text
    • http://gomelavto.by/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/roblox-earn_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-group-payouts_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_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 25620 bytes
SHA-256: 7aa9d2d87362599a949916b4529a97b6f15c49a2df4a6a365d83cd5202a80551
font_01_sfnt_off00008250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8250 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED5 18052 bytes
SHA-256: 78e09613e9051ea2c05113a2cb3e2459165660dd7357248de65be6b789990433

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