Malicious PDF — malware analysis report

Static analysis result for SHA-256 e400d65c88a2b12f…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 08:14:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5687392f14dc65640d8263a130e77c16 SHA-1: be296e7c705d16a0a3c757262681f577d7c2a038 SHA-256: e400d65c88a2b12f65e907c1a4cd71bc06f82511239615b2d8046c4ddea06e45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The embedded URL and the document body text both reinforce this lure, aiming to trick the user into visiting a site that likely hosts malware or further phishing content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/minecraft-apk-free-download-016-0-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-2021_GM406889139.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_004_off000050e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E6 24056 bytes
SHA-256: 63d5384bcaf8cff83664c62bc41e3ed629fec77d2aa2c0c6cdbf4f416a17c4ab
font_01_sfnt_off000086d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 19080 bytes
SHA-256: f13f0d8e664d8a95e4a41956b425f9fe55b0e7914f7d7dfb5e00b4a0dff36d0a

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