Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea95381c738580b7…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 16:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cc4c7ac13d57b2ca649eed59ed1d3a9f SHA-1: 0f7ac568537223903e1ac539fb5db6586375e46b SHA-256: ea95381c738580b735dd85a7ec45a7b8dd188b6e3c6fe1c3c3af7da00761a9f3
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency for games like Roblox and Coin Master. The document body explicitly mentions 'Free Robux Generator Without Verification' and includes a URL that is flagged as a malicious redirector. This suggests the primary goal is to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-robux-generator-without-verification-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-retrieve-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/money-hack-roblox-sunset-city_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/my-roblox-account-has-been-hacked-pin-enabled_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-projet-jojo-hack-gui_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/ww-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/maps-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-clothes-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/fort-hood-texas-hacks-roblox-yt_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-hack-sur-pc_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_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22428 bytes
SHA-256: ef21c6f7461f04a13d61b6433a9cf93033b97f82646628711c835853fa659a30
font_01_sfnt_off0000609f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 19436 bytes
SHA-256: d0e926b628c6de032872dc004c24afa0bd818e7bb7e50361af68be366a642f01

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