Malicious PDF — malware analysis report

Static analysis result for SHA-256 222c7443f9b31a4e…

MALICIOUS

PDF

45.7 KB Created: 2021-05-19 21:17:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b5e9c2e16915777661ee050fa67c0e97 SHA-1: 87abfa4a8bb718528a02faf359f1f20858547a56 SHA-256: 222c7443f9b31a4e2284d8957fc588929e050975bf88668d306203756c093ba4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and extracted URLs promote free game currency and hacks, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-collect-today-free-spin-game-hack In PDF document text
    • http://hk-kan.org/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/www-bandicam-com-free-robux_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_off00004aab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAB 26160 bytes
SHA-256: df321de40b4f7bcf6598d12f83db83e6077025bbadd7390890718eec6250af6e
font_01_sfnt_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDB 18316 bytes
SHA-256: 067ee842a42bfe5a53e1cb92f98c8b2340557740837e286662f405d2db83d214