Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ae5ac7ee1315c6…

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 17:32:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7cc865cc644a0f7212561ff8a5434082 SHA-1: 87cefbe358cfe733e1909fbdf92cdeec941b06b5 SHA-256: 77ae5ac7ee1315c65257058ba39e8da19d3d0beddd58a6cfc863fee7583e1855
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically designed to lure users with promises of game hacks and free currency. The primary URL, 'https://netcdn.xyz/app/406889139/free-coins-and-spins-in-coin-master-game-hack', is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to these malicious sites, likely for further exploitation or malware delivery.

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 https://netcdn.xyz/app/406889139/free-coins-and-spins-in-coin-master-game-hack In PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/rbx-com_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/minecraft-font-free_GM479516143.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_off00004b06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B06 30556 bytes
SHA-256: 58e8c1036641911af0c18ecee344b958aa5ea0a38f426eb5032097b5025c1c5d
font_01_sfnt_off000089e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 19212 bytes
SHA-256: 05bb786c6fede880338aa357916114cbc0f39f36dd6270cd8278a050c419cf0c

Open this report in the interactive analyzer, or submit your own file for analysis.