Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bb395448fa77b5…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 21:05:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bdc67a22b9b55bd737ad38ebb80c4ab6 SHA-1: 3195f7a9f6c9df316d76ef426d478a90bfccdf7f SHA-256: 14bb395448fa77b5774f3f02846fc1b6b45688ff2834f52044cbca209eb8b78c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/free-russian-clothes-roblox-game-hack, which is designed to trick users into downloading further malicious content. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a download button lure reinforces this assessment.

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.co/app/431946152/free-russian-clothes-roblox-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-instant-kill-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-t-shirts-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/external-roblox-hack-2021_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_off0000321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321E 22600 bytes
SHA-256: 0f377ed7e8c75052dfe216fe556ac15d155e2ed2d2d4f8fbaac3c6f740368416
font_01_sfnt_off000064b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 19180 bytes
SHA-256: a07fba550df55950c57080225eb51275032ab9d9517fd6bd8c6059d492265415

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