Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5d37421e871b29…

MALICIOUS

PDF

45.2 KB Created: 2021-05-12 04:30:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d7d9942b16ee6f13bd6ebab1dc608f32 SHA-1: 5253cfe1288fc33999acc20ab9843517d9881deb SHA-256: bc5d37421e871b29208d19159305ea94ea804f703338f8eba47cdcb60d324691
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering 'free generators' or 'hacks' for popular games, indicating a lure-based attack. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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-free-spins-daily-game-hack In PDF document text
    • http://dejipkesbelt.nl/images/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://dejipkesbelt.nl/images/roblox-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_off00004b43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B43 24924 bytes
SHA-256: d2eaf1f89b0ad28469fc8a9db7d28e8351cf94446fd81de93b31c25532715a32
font_01_sfnt_off0000843b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E26 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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