Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9013428b6af454…

MALICIOUS

PDF

43.3 KB Created: 2021-05-12 13:50:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 182ad62a955cd4c23da19b7293ebb938 SHA-1: e5f1f4b819dfe4e7362c070689c309eb591636d8 SHA-256: ac9013428b6af454ad3d61c2ef804e2ac3dc349ca3877a131ce5b6306fd6939b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and free generators. The primary lure URL is https://netcdn.xyz/app/479516143/minecraft-apk-free-download-game-hack, which is associated with a 'free generator / game hack' lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/479516143/minecraft-apk-free-download-game-hack In PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://berkahjayamulia.com/ckfinder/userfiles/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAE 25000 bytes
SHA-256: 69757e737482cbaa3d66e4d86670387f69661127d45c09e742ea1e9c5e65a55f
font_01_sfnt_off00008602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 18636 bytes
SHA-256: 460052af6c2621f53863fdd0e184641c8149664fef9b3bc68df6f3fcb4cff320

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