Malicious PDF — malware analysis report

Static analysis result for SHA-256 602a5447fa5e0142…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 19:51:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e9e29e43db0446f1b9123c7cf7258152 SHA-1: 2c88e5c6cf478903f4a44d82687cb37a84d78959 SHA-256: 602a5447fa5e0142659f2fc5b06c0dc7667d7b7895d3bfae895c131483a12242
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/how-to-free-robux-game-hack. This link is presented as a lure for "free Robux" or game hacks, aiming to trick users into clicking and potentially downloading further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-free-robux-game-hack In PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/hack-des-robuxs_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/2021-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/one-piece-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/broward-county-roblox-free_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-cash-cheat_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://ee.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-script-roblox-and-hack_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_off00002cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC5 21584 bytes
SHA-256: 7ce577736fe59330b6401613abef227931945fa8947a453b602b6d39807d667a
font_01_sfnt_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 18880 bytes
SHA-256: b6c4639a0efa27a474f01e4d286fb143e2370880626048fbfb2abea6535030cf

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