Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7378cba671b2cea…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 19:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7f032af53782b16a83c88e5be8323672 SHA-1: 25119c05f85dd99b84ee5e1a72d3c8271f6c164a SHA-256: d7378cba671b2ceac60f4eef2154c43789dc5ed223aff27beda07fe163e3aab5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of free game currency or hacks, such as 'free Robux'. The primary URL, http://netcdn.tw/app/431946152/free-robux-codes-not-used-game-hack, is directly linked to a heuristic firing for a game hack redirector. This suggests the document's purpose is to drive traffic to malicious websites that likely host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-codes-not-used-game-hack PDF link annotation
    • http://cintabaca.org/katalog//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-coins-on-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-and-tix-hack-generator_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/new-roblox-aimbot-hack-exploit-strucid_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-free-app_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pubg-uc-daraz_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/extreme-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-cheat-us-mobile_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/alone-in-a-dark-house-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hacks-not-patched-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_off00002f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F30 22336 bytes
SHA-256: 8b2d2d2da0ac5983fbd8ecdd279b6e69eaf6844af3adf980ff95fa45c7d9218c
font_01_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 18996 bytes
SHA-256: f2ef840589acbf5544ca5c360f8f850f834bdb07628ffcf9725997a7326c7744

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