Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e7bd6cd4eb1bba…

MALICIOUS

PDF

44.3 KB Created: 2021-06-08 21:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac9b5670791098dab8c001790947b9d7 SHA-1: a30b41e987d1c2b6bf7b461349e4649f658bc8df SHA-256: 25e7bd6cd4eb1bba124a538bd81ee461b196c5fffe10bbf32fdbefbabc844dec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it's a lure for game hacks, specifically linking to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Roblox' and a URL that aligns with the lure. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be social engineering via a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-funds-groups-roblox-game-hack In PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/anyway-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-model-death-star-roblox_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/roblox-dominus-hack_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/roblox-robux-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/script-executor-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/roblox-intriga-injector-free_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/simple-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-fans-on-tiktok_GM835599320.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_004_off00005218.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5218 24264 bytes
SHA-256: c29e2dea7f10995843f5dbeb58c5d4be9e3bbb2fe9ac21ddc77bcb4a74fa88c1
font_01_sfnt_off000089e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E3 18440 bytes
SHA-256: 152c3f83808f3fe235ba57620edb4391f965286a143a01d929de701242b564a5

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