Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5fc864d0d8285b…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 08:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d46894fc9721aae9bcf40472ba0923d9 SHA-1: 5a437efb820c9c0a6eadd1f14a75bc8bf53c6c35 SHA-256: df5fc864d0d8285b425e8e91d3a82bcdc75ffe45b55ee92045149bd478577bd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free items'. The ML classifier also strongly indicated maliciousness. The document's content and embedded links suggest a social engineering lure to drive users to potentially malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/coin-master-hack-unlimited-spins-game-download-game-hack In PDF document text
    • http://rivne.media/ckfinder/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://rivne.media/ckfinder/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D00 24368 bytes
SHA-256: 1281869e63ce7f58031e27e3c6e5d8bac29286e1bc41a58bd86a3db50660340c
font_01_sfnt_off000084e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E7 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E87 18916 bytes
SHA-256: bde0eed1bfad508078df2378b9fcc27a2ef02f44c57d1a1bbad0912f0d0a144b

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