Malicious PDF — malware analysis report

Static analysis result for SHA-256 082ed756829550b9…

MALICIOUS

PDF

43.3 KB Created: 2021-06-04 03:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cd206416d55ccb6f919af37f89b24818 SHA-1: 5882b269d57c538c25f5900109b513c4a1596a74 SHA-256: 082ed756829550b9b800a550ce69da6d97b48d566bc19917d51160ad4366ad4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/406889139/coin-master-hack-spins-game-hack In PDF document text
    • http://www.opac.stieimalang.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-free-promo-codes_GM431946152.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_off000050c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C4 24068 bytes
SHA-256: d69cffb49ee30567af254190e53d78034c2b88c508cb043da2baf4400e6c8a96
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 17892 bytes
SHA-256: 340cad640208a3f63c565dece8f0e8a86db030e36dd2ab9bf46956c7901539b7

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