Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa995d367bc26b6…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 21:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 639955ac5465b517933ca3fe134fb121 SHA-1: c5ab4b49308b624f13edd1a6ae186f0096f46d98 SHA-256: 7aa995d367bc26b698d609ab04c43b6a2e62f2e4316433d11af7c594f3d2e644
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-install-free-game-hack. The document body and heuristics suggest a lure for game hacks or generators, likely intended to lead users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or malware distribution attempt.

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-install-free-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-hack-tool-with-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-lumber-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/pokemon-brick-bronze-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-for-coin-master_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_off000030ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AE 22260 bytes
SHA-256: 941fae54632ac65d902f5e6ef820980e6c6710870c1615fda681880a7ca218fa
font_01_sfnt_off0000625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 18752 bytes
SHA-256: 1d55b3fd9f6369f8e68c2ca1b9c300169a68fb96c94d2ac67d1ae5c18d40cf4f

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