Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9994f8d5289f102…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 05:39:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 05b0e380821f8ed5b88bca6fd5cde365 SHA-1: 337bc27f7f733f7978eae5f53e197954f4e9cf6a SHA-256: a9994f8d5289f102ed2d6b5fc15a3b2d74b589264029706b319dab70ecd3eb3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free virtual items, a common lure for phishing or malware distribution. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this pattern. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/nike-t-shirt-roblox-free-game-hack In PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/what-does-e-free-mean-in-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/2021-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/cheat-files-robux_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-shirt-templates-roblox_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_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 21832 bytes
SHA-256: 9fd14ebb659924a4a3bc3c198f8e119cd5b039fd1a4561b7921d84960e83f644
font_01_sfnt_off00005f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 19212 bytes
SHA-256: 10e0256c302152660dc36de4f528e3e9415a39110e83c2d3109bbc97973aa699

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