Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc4aa90dd86c228…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 14:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e0c6534f7d2bd65891efe0581288f94 SHA-1: a16bcc41b1abb6a402dbac10edb30cfb24f5cb0b SHA-256: 9bc4aa90dd86c228524a8ce0edf91642302eb25a5a034cf47f6f9b4ffcfdcd42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are designed to lure users into downloading potentially harmful files or visiting further compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-cracked-apk-free-download-game-hack In PDF document text
    • https://lita-lb.org/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/level-coin_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-on-roblox-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
stream_003_off000049da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DA 24560 bytes
SHA-256: 9db5c39ca9ff4e420a34ce56e9b3aeb9650e5e5e45b40639ca09ce5025c64c2a
font_01_sfnt_off0000813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 18636 bytes
SHA-256: ce5b0e3eeaf971f653fd3a856714b5eb72d36c019aebfe22933050d37cc78532

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