Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f4151ebfcb9466…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 05:32:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fc6205b498b997c2a31055fe6cc26c78 SHA-1: 4c1e6fe6f706e70c996f09f352bdb118b3d651b1 SHA-256: d2f4151ebfcb9466311e1f0092f8068944e6fb47d873f791a672a9547743b2a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-hack-robux-game-hack, which is flagged as malicious. The document body and heuristics confirm a lure-based attack pattern designed to trick users into visiting these malicious sites.

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.tw/app/431946152/how-to-hack-robux-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-make-roblox-dont-saw-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-links_GM406889139.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_off00002eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEB 21952 bytes
SHA-256: c51a174830c1acb2cf67651f0b55374ee9d4fc00d5c1385f71a5d9b6876efae5
font_01_sfnt_off00005fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 18884 bytes
SHA-256: eabb09a914750731f64ad11a0b688188fe1798403d7ade495959fd69a4976413

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