Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9ade0441c38895…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 14:45:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d46dcd2bd5c853f67e780681395df44 SHA-1: 77eae635c0d89500c936e00b05254eb18927c1d7 SHA-256: 5d9ade0441c3889594dfd017813f6bf4708206e628c954d3821a2336c99e9f89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of game hacks and generators. The document body and embedded URLs suggest a lure to trick users into downloading further malicious content or visiting compromised sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/do-coin-master-hacks-work-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pokemon-go-free-dragonite_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pastebin-roblox-free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/do-coin-master-hacks-work_GM406889139.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_004_off000052c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C6 24644 bytes
SHA-256: ebd6173c79d46f3571f4cabf5096006db4ab26c52b5cae7a5175574f984d5ae5
font_01_sfnt_off00008a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED4 18084 bytes
SHA-256: f8c78c837c510fd4c2649389405ccb72ed9929e6c9684da8546624ee5ed0ed92

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