Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6282a560d3d4f4…

MALICIOUS

PDF

42.8 KB Created: 2021-05-10 15:34:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: afd99a39299a945db2f8197f513c6afc SHA-1: 79d723ea8d8d6c9365f565e637746076141dec83 SHA-256: dc6282a560d3d4f47b9a6f126f5b6fe09b7098dee4ba846638cc3fb6edf47b29
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains multiple embedded links, including one identified as a malicious redirector for game hacks. The document body, though partially garbled, contains references to game hacks and URLs, reinforcing the lure. The 'SE_CLICKFIX' heuristic indicates the document may also instruct users to execute commands, further suggesting a malicious intent to redirect users to harmful sites or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-free-minecraft-game-hack In PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/minecraft-book-collection_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_off000046d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D1 28868 bytes
SHA-256: cddf6020c1f9dbf95f9cf7cb198678a63c1bef0c6eed587c850ca644f78de3a7
font_01_sfnt_off000087f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F0 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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