Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c18a545fe4b5a7…

MALICIOUS

PDF

35.7 KB Created: 2021-06-25 17:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91eabd291a0f7d45b17c2fcf8c6747a0 SHA-1: dac6cc7bbc5d70c6eeb5183770f6bc62113d1e4d SHA-256: 88c18a545fe4b5a72e314bd3986a23cf9e635817d0a5ed90e390beb006c09453
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for a "Roblox Cheat Codes" generator, directing users to a malicious redirector URL. This URL, http://netcdn.co/app/431946152/roblox-cheat-codes-for-robux-2021-game-hack, is associated with known malicious infrastructure. The document's content and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-cheat-codes-for-robux-2021-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-shaded-shirt-template-free-shipping_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/pokemon-go-free-90-fps_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/consquence-of-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/the-community-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-change-your-name-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/5-games-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hoew-to-fly-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-hack-for-rocitizens_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-speed-hack-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/robux-offers-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-pfficial_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-club-hack_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_off0000314b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314B 22860 bytes
SHA-256: 3e7ab8d344a39aa8d3e7e65de507c0c7f3ad602614325f8b837609e05e7c6120
font_01_sfnt_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 19636 bytes
SHA-256: 959841620d78f7ed95fa05ee99e0e8be884222af7f76e37a037d566b3b75947a

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