Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d5345d2025a894…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 10:12:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 42ef1684f2dc38452172a533af5bc79a SHA-1: d5e94b3962bdd0b08c3f8536d3afdcc4111403e7 SHA-256: 98d5345d2025a894e740e1dd6d17bb013b2497f4efc06082ef3d3d0aa9a31393
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Roblox Hack Generator' and related lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings indicate a clear malicious intent.

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-hack-generator-game-hack In PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-corruption-hack-download_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-dominus-rex-and-messor-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-magnet-sim-hack-script_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/games-on-roblox-that-will-give-u-free-hat-youtubecom_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-hack-apk-pc-download_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-gampasses-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/hacking-third-party-client-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/noob-vs-pro-vs-hacker-roblox-bloxburg-build_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/hack-para-trials-simon-says-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/can-you-give-me-free-robux_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_off00002fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA7 22424 bytes
SHA-256: ff22150fa7a4514ce798f8b52830a2bbf40573603b5ddfa8daaeb7191d79d431
font_01_sfnt_off000061c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 18760 bytes
SHA-256: b79899937f6f59d67c0cc016ae9e295c0b2eeda93cfd6b0750b290eebb9c7341

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