Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb60714d188c7210…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 09:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a1a77246f4f7dd003bfc41e5b0492519 SHA-1: 342613c96e101aa61efcb95f25d14f20486af55a SHA-256: fb60714d188c7210e9195081c6b8c619bf1f981df46eed31a4c1c2fefc8f5104
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF files, all related to game hacks and free currency lures. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-rape-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites, likely for malware distribution or phishing. No scripts were extracted from this sample.

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/roblox-rape-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-wings-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/working-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/earn-rixty-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/alphalife-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-no-downloads-needed_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-pe-free-download_GM479516143.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
stream_002_off00002cb6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CB6 22612 bytes
SHA-256: d14c6e36a7d91c9cb33ac9c9302feed997836fbbc9c2d707a65df73ab3bdb4a8
font_01_sfnt_off00005f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 18664 bytes
SHA-256: fe14123ce2711b2ffd0ba583e6768d40fb29997b781900255e18c814d8d61246

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