Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ce2c7bedc946d8…

MALICIOUS

PDF

44.1 KB Created: 2021-06-08 18:36:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 66ff0c7a736d0bcc230c03b244bb17c4 SHA-1: 70163878e8eb78875c838772bbb7c9bcd992cd62 SHA-256: 95ce2c7bedc946d8dda589a622d628fd7d31b36fd318bca0a3efd36352bb043b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, directing users to a malicious redirector URL. The ML classifier also flagged this PDF as malicious. The embedded URLs and the nature of the lure suggest a phishing or scam attempt, likely to deliver a secondary payload or lead the user to a credential harvesting page.

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.tw/app/431946152/cheat-in-roblox-jailbreak-wall-hack-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-royale-high-school-hacks-de-todo-tipo_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-rewards_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
font_00_sfnt_off00004f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2E 24856 bytes
SHA-256: 751c2cde61776f9cf16a884c4e4819d35f4d3a3feb8aa8444e8e6c60c407490c
font_01_sfnt_off000087da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DA 18936 bytes
SHA-256: 5ab16ea79a407e01a7298d90060d17eaed79a340400a79e9187229bda1a54d65

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