Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9718273e296009…

MALICIOUS

PDF

35.7 KB Created: 2021-06-26 04:52:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1471e8f4c022b43eeb535ee5e7c460b SHA-1: 89aed4f6db66a653dc8fd530bf1ac358ea05ae70 SHA-256: 7b9718273e296009aed528169c6c9c4a1b3b51708aab9e6d18e29fa33f4d879a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and free in-game currency for games like Roblox and Minecraft. The primary redirector URL is http://netcdn.co/app/431946152/hack-lucky-blocks-roblox-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/hack-lucky-blocks-roblox-game-hack In PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-change-a-name-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/code-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/counter-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-hack-roblox-to-get-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
font_00_sfnt_off000035a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A1 22112 bytes
SHA-256: e34219dfebf5d48fb9fe6edf40294b032713fe01563757965f26a40782fa6ac3
font_01_sfnt_off00006689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 18976 bytes
SHA-256: cf30cdcbbe39584cce3d960b00e441982776d8144d83bfd1f702becc35ffc500

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