Malicious PDF — malware analysis report

Static analysis result for SHA-256 38956e8b667c8f35…

MALICIOUS

PDF

46.3 KB Created: 2021-05-12 06:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bec760704e8d1e09cb19d1bb8cd6e0d4 SHA-1: ac8672875e05d313f3d4fb634b36b610182bdbbd SHA-256: 38956e8b667c8f3528b10d51f962b681a03478be097cb712ab3b8d7bf58446fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-games-with-free-radio-game-hack. The document body and embedded URLs suggest a social engineering attempt to lure users into clicking these links, likely leading to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/roblox-games-with-free-radio-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-com_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB0 25172 bytes
SHA-256: 725d74c8a42fc863684d0606f24fbb542d0f17abfddf63508ccdf2640f6cce76
font_01_sfnt_off00008628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDA 19200 bytes
SHA-256: 1d90b013fd0ba072e710b1a1c7967957ed75a631fea3266b3a2ef171103bab79

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