Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ffeb293ba69c43…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 00:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3598b26b372a60127a21dbb43b259e94 SHA-1: c95675d6eb58a21c80e00f53c86abb71415ab633 SHA-256: 02ffeb293ba69c435ed9a47baf349ede9a1fab2642a48c0d7ec9e87c5b41b521
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service, specifically advertising 'Roblox Robux Hack No Download No Survey 2021'. This lure, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or scam attempt. The embedded URL is the primary indicator of compromise, likely leading to a further malicious download or exploit.

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.co/app/431946152/roblox-robux-hack-no-download-no-survey-2021-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021-august-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-put-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/v3rmillion-roblox-cheat-engine-bypass_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-mpgh_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-top_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-glasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-phantom-forces-aimbot-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-no-verifying_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-para-roblox-dragon-ball-rage-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_off00003259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3259 22116 bytes
SHA-256: 61c98d354b7689aff73a590830e31bd10540e7783e255d56a3043afe83364e9e
font_01_sfnt_off00006398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 19996 bytes
SHA-256: ad3de8a583b8cbed1f93757167b4e30b1162558772d40701e9ee1a81e3692056

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