Malicious PDF — malware analysis report

Static analysis result for SHA-256 15905b91bc117ce6…

MALICIOUS

PDF

42.6 KB Created: 2021-05-31 00:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb04d8f87183e2e873ea308c7067b3d4 SHA-1: 42aa9666d87acbe0df27b15252d59e5cfefb5c74 SHA-256: 15905b91bc117ce642fd8d4ad142b1f230db1246e645a0554c87e8a1cd4fb926
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure for 'free Robux' and game hacks, strongly indicating a phishing or scam attempt. The primary external URL, https://netcdn.xyz/app/431946152/free-robux-codes-2021-game-hack, is likely the initial landing page for the malicious campaign. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/free-robux-codes-2021-game-hack PDF link annotation
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.mao.org.my/wp-content/uploads/fsqm-files/free-tiktok-likes-app_GM835599320.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
stream_003_off0000472a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472A 26748 bytes
SHA-256: 1936a9cb083b32318237b55f4dcdd8f502f9027853e1d3b7061d3cf3c2cc4611
font_01_sfnt_off00008331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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