Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8c1fbc41c80139…

MALICIOUS

PDF

45.8 KB Created: 2021-05-10 16:45:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1054d1246ab2a593b8548cc55101eb83 SHA-1: 0b5672243468e6ae4e67ab64790b57e1f9cec5d4 SHA-256: 4f8c1fbc41c8013997156d0303d7e6d9a9ded450c7ae6945b704e6dc16e9b108
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hack generators. The primary link redirects to known malicious infrastructure, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow, likely involving redirection to a site that hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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-skins-boy-free-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/114-hacks_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-generator-no-verification-2021_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_off0000489c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489C 26792 bytes
SHA-256: d4b3fe9c0659cc90b29b72c78f5d085e7040e84a5d8c13ba821ad849a108ff2e
font_01_sfnt_off00008630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8630 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000901b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901B 18420 bytes
SHA-256: f34de68c913d1c931e579594a611635df95b6f402bf6c6d3ef5f8f4a3ceebe71

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