Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cf64f9d952375e…

MALICIOUS

PDF

52.0 KB Created: 2021-06-03 05:18:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 71a4d81b150007d95e68d36524b737b6 SHA-1: f91a7534a4fc48fe7924a50f6fc71dfdc734f1f0 SHA-256: 46cf64f9d952375e5c7f84464692c92ce49e1e736f7ff1d460ad860dedd47510
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and a link to a known malicious redirector. The embedded URL, https://netcdn.online/app/431946152/how-to-buy-robux-for-free-game-hack, is designed to trick users into believing they are accessing a "free generator" or "game hack". This likely serves as a lure to download further malicious content or lead users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/how-to-buy-robux-for-free-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/games-that-can-be-hacked_GM431946152.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_004_off00005390.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5390 25736 bytes
SHA-256: 08c3238644feb5c50b0cdd7a2af2522821169f7b041cde25c09e697e690cef62
font_01_sfnt_off0000900b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 7460 bytes
SHA-256: 526aec9b921a89828d192891a87d449362f4c865cfc4f27978ba6ca18696e833
font_02_sfnt_off0000a8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A2 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866

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