Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6ed79ad1c240de…

MALICIOUS

PDF

40.6 KB Created: 2021-05-19 16:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fbdc7f6f5e8767d37e8d2cf382a687e SHA-1: ae8d75c498c2825538df3794a28142e7d74a6286 SHA-256: df6ed79ad1c240de6fe99aad045fa25abd0e977eb73685b47ac891d60827eb99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious sites for further exploitation.

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/1330123889/pubg-uc-100-bonus-game-hack In PDF document text
    • https://duoledesign.com/image/data/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.midasbuy.comIn 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_off000043f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43F1 25508 bytes
SHA-256: 8367fcbf1b7bdee0f3f352bf864c7f6575d5fc545c7ed25561504d0de89847cb
font_01_sfnt_off00007c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C28 18316 bytes
SHA-256: 83b78c71e6ead43f7f70ceda9a4433ecb4e39de92e1457b75d1fc65bd4955603

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