Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cebe1efa90e70f…

MALICIOUS

PDF

43.9 KB Created: 2021-05-31 02:06:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1fbe40ede64f005fbbed67d9dc28871 SHA-1: 65c31ef0c7882dae8ed9d081d0bb915bbb911fd7 SHA-256: 71cebe1efa90e70f058ac6c916219cde54767c3d61aded0cbe058568e57da76d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body, though partially corrupted, contains text related to 'free Robux' and URLs that reinforce this lure. The presence of a malicious redirector suggests an attempt to lead the user to a site that may host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9463

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/431946152/how-to-buy-robux-for-free-game-hack In PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-accounts_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
stream_003_off0000518f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518F 24000 bytes
SHA-256: 8675621f6e33482bd4aeb37f00845d1d24ce533d362a675f62373006d610fec8
font_01_sfnt_off00008863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8863 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866