Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f968fe13722fc3…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 08:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f4f6abdbbefbfd6a4fcdb201fb4c1771 SHA-1: ad4872ebfafe462b3760fad2cfd184c773a108d3 SHA-256: b3f968fe13722fc3c5df12b389361ceee634230db3ef6a63ee5bb54646d6d49f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a 'free generator / game hack' redirector. The document body, though partially corrupted, also contains URLs related to game hacks and free in-game currency. This suggests the primary purpose is to lure users to potentially malicious sites that may host malware or phishing content. No scripts were extracted, but the embedded URLs are strong indicators of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/fighting-free-card-coin-master-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F7 24984 bytes
SHA-256: 8466e5754535b6ef9ffc4d4e3ffb90f1f3aa96b7d97478c0e81e16f89eb15e42
font_01_sfnt_off0000813a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADA 18336 bytes
SHA-256: f0cd4d6bae61bb9f7721c88e5b38a7df4c9de99d8fb8d81dbaccb772e8fa5d98

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