Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d9a2830645be24…

MALICIOUS

PDF

33.5 KB Created: 2021-07-09 01:30:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e1e5c7e7182c7283ac1ba16c2f4dab43 SHA-1: 9242b09b8e9f23e1a2ddf2c1ff452dd18cb39b54 SHA-256: 09d9a2830645be24eda98adc90d77df2aeacb5a6d84aea29493edff5d7e80b27
160 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure. The document body explicitly mentions 'How To Get Unlimited Robux 2021' and includes a call to action to access a 'ROBUX GENERATOR', indicating a lure for potentially unwanted or malicious content. The presence of PDF-specific heuristics for malicious redirects and game hack lures strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-unlimited-robux-2021-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-teleport-in-roblox-ragdoll-system-test-no-hacks_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/where-is-the-hacking-station-clone-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/pubg-2021-uc-glitch_GM1330123889.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-rocitizens-money-cheats_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/robux-hack-no-verification-human_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_off00002b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0C 21916 bytes
SHA-256: c0aa953f0dbe5d6e5b0da98d63166dbaf0dc73023d3bf0e8857cb56555aba68f
font_01_sfnt_off00005b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 19852 bytes
SHA-256: 278fdd7327daa8a6414ea0a2903b1a6c0a54117624bd7cf29ca19a8e75478411

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