Malicious PDF — malware analysis report

Static analysis result for SHA-256 888e2f09acdc6c2f…

MALICIOUS

PDF

33.3 KB Created: 2021-06-19 14:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 124cc587b588be17a76246b6ab5f1e54 SHA-1: 02a73d16cb42ca016648a19ec66e367a6237b490 SHA-256: 888e2f09acdc6c2f18aad2f85bce89b4b20976acafb4a6296e14f312ae0ec64d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs reinforce this, pointing to sites offering free Robux or Coin Master spins. This indicates a phishing or scam attempt designed to lead users to potentially malicious infrastructure.

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/notoriety-hacks-pastebin-roblox-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-roblox-on-the-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pubg-uc-via-login_GM1330123889.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/bot-roblox-game-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spin-today_GM406889139.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_off00002eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBA 21088 bytes
SHA-256: 80f6b289eb85f0940d47bccecd0743f3b8c96165f1b048244bc42fabcddfb029
font_01_sfnt_off00005c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 19216 bytes
SHA-256: 25574ddaa04916d37e65ca10a8eecb2a1d8ec677963581857592bcc3c249e767

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