Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be79ab8605e335a…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 00:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e4d8cabe6c153da5d651b30792c87b8a SHA-1: de57aafead9e125024044d2cf68ddde2895e9725 SHA-256: 4be79ab8605e335af806af22921db5cb689c51e8a1d8afa642ae99651bdcb3f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generator' or 'game hack' lures. The primary URL, https://netcdn.xyz/app/431946152/free-robux-real-working-game-hack, is directly associated with a game hack scam. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-real-working-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-hack-free-robux_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_off0000499a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499A 26164 bytes
SHA-256: 899cf49f6ba04da9d486faf78d2f1a49b7ca6039ef8b2dccb7338b40e11913dc
font_01_sfnt_off00008713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 19092 bytes
SHA-256: e9cbc94ede6f039b2d64cc554d217f5f9744837c58519873c9f71b22e801d63e

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