Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7af074d2f5869…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 09:07:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d6674f69387d66a8defb669191ca8c7 SHA-1: 34548b4f0f95c6328833148e1bcdc290e5f5b1f2 SHA-256: bce7af074d2f5869fe226a9311656183bdbe8a3df9a4aefaf172813b78297feb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free game hacks' and 'gift cards' to lure victims. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button heuristic further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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/free-roblox-gift-cards-2021-game-hack In PDF document text
    • https://audev.com/images/comment-hacker-robloxe-facilement-sur-pc-2021-en-francais_GM431946152.pdfIn PDF document text
    • https://audev.com/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://www.audev.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://audev.com/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://audev.com/images/free-robux-rush_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/robuxin-robux-hack_GM431946152.pdfIn PDF document text
    • https://audev.com/images/difeml-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://audev.com/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/free-ways-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://audev.com/images/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/roblox-cheat-codes-for-money-on-jail-tycoon_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/hack-robux-free-2021-pastebin_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_off00002f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 23192 bytes
SHA-256: ec28b298f368c1ee9fe0dc9473d288da634c6c0ee381e3b4996f54eb235ccf11
font_01_sfnt_off000062e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 19452 bytes
SHA-256: 8115ccb621edd4612311f62a2018219b20574293e23f0c1b138e5e1805582403

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