Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e50ef217a239f8…

MALICIOUS

PDF

49.1 KB Created: 2021-06-07 09:14:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f475acbab5116b427e96c5e3f9de09e2 SHA-1: ddbf657509af30e8c4d27241441588490912eb3a SHA-256: 57e50ef217a239f806d6909a1b752b254bfb3af0b5d847cf5b047f688cb41fd2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free generator / game hack' content, directing users to a known malicious redirector URL. This is supported by multiple critical heuristic firings indicating malicious redirector links and a general ML classification of malicious. The document body, though partially corrupted, contains text related to 'Haow To Hack Robux' and the malicious URL, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/haow-to-hack-robux-no-bc-game-hack In PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/gamingultracom-roblox-free-goup-generator_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/hack-robux_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-wings-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/how-to-get-5-million-free-robux_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/robux-no-human-verification-free_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-fake-no-virus_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/how-to-hide-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-clothes-for-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/charlie4-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-robux-no-human_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-robux-card-codes-not-expired-2021_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-roblox-account-getter_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/free-robux-and-builderclub_GM431946152.pdfIn PDF document text
    • https://willemvanromburgh.co.za/wp-content/uploads/fsqm-files/how-do-i-get-free-robux_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_off000055a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55A2 32240 bytes
SHA-256: e8c0198a0e6046a4c4c6f57ee5eee491c6f05bb3d7041dac5f9d1879ea04b826
font_01_sfnt_off00009d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D08 18412 bytes
SHA-256: d26d69e06e4e8544871f370b2b6df058aa61f008efa291332349f340490b76ba

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