Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a043516ada71b6…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 01:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c2df775cac9cefaf501c4c97f34fd8ad SHA-1: 287e3a5a549827206b68e31b354837804641a1d0 SHA-256: c6a043516ada71b6eb0eb20ecb205d08355c822ba4dffaf23b63227a51f76106
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with 'free generator / game hack' content. The primary malicious link, https://netcdn.xyz/app/431946152/how-to-get-free-robux-fast-game-hack, is designed to trick users into downloading a payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering attack aimed at initial compromise via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-get-free-robux-fast-game-hack In PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/moon-active_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/rbx-com_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/wurst-115_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-person_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-reddit_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_off000048cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CC 27364 bytes
SHA-256: 3e5c02cebe04bd28936537da3328c1eb2f9f4abd875d71dd0f1f3e138a569612
font_01_sfnt_off000086ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BA 18512 bytes
SHA-256: 7aab2f7b5cdd23eaead05a2c9912e4a9dcd99cb50fd9423eae012b149ac71853

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