Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4281147fe3b8c9…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 00:22:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 40aa02df71e39a3a4ec68d1815e15cae SHA-1: ac6708f63b29c4ac7a47c88d929d053d7d098bf6 SHA-256: 0e4281147fe3b8c917e9aa32562e28702a325153c87e6d450395b0253fa97840
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" or "generators". The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-time-hack-2021-game-hack. The presence of embedded URLs and a lure for a download button strongly suggests a social engineering attack aimed at tricking users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-time-hack-2021-game-hack In PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/cute-free-roblox-clothes_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_off000048f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F5 25748 bytes
SHA-256: 5bbbcd3a233393dece23d746e8c740493574fb982e802ad6e9b129c556aac63e
font_01_sfnt_off000082c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C2 18380 bytes
SHA-256: d61a4547520ea8cafecc3ed258c73b3244e9bc9b68d98ecd8e3226df3b2774a6

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