Malicious PDF — malware analysis report

Static analysis result for SHA-256 471d01c33e3bdcff…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 16:25:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c36d2213435b0aabf74db6bfd5d20144 SHA-1: 395bd4aea63c6e419ac2cec86e8731241262164e SHA-256: 471d01c33e3bdcffba76b060baa6805d468cd7ff801525a07648c0269a3e2755
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appear to be game-related hacks or generators. These links redirect to malicious infrastructure, specifically `http://netcdn.tw/app/431946152/roblox-hacks-com-game-hack`, which is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites.

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.tw/app/431946152/roblox-hacks-com-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/roblox-how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-human-verification-or-survey-2021-for-kids_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-how-to-get-free-items_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-jailbreak-hack-redboy_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-clothes-on-roblox-no-builders-club_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-account-hack-app_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-free-on-pc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-hacks-glitches-or-troll_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-coin-master-haktuts_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_off00002f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F23 22188 bytes
SHA-256: a774a91c90f7f372445dc1f6f5280edc3af908fde2843ab34dd3e239520e1e60
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 18916 bytes
SHA-256: 5602ec78d0973736e8df03d49b0c299d43ad09969882d8f10ad3423cf39d9468

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