Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a876320be828a1d…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 10:13:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30277c76943c1b6a14f0594bb32a885f SHA-1: d09dfe9d7f001168217323c79189430edbc44e88 SHA-256: 8a876320be828a1d5b7cf1b3a692171cc607bd9bd043dd3bea6c5960fddb0a41
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Coin Master Hack" and presents a fake CAPTCHA to trick the user into interacting with the document. It links to a known malicious redirector infrastructure, suggesting an attempt to download and execute a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-hack-programers-game-hack In PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-mod-version-free-download-ios_GM406889139.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/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/robux-today_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-robux-gen_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_off00004b42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B42 24440 bytes
SHA-256: c83406577512cb7e0aacf8283751b272c8675d871f889c294375a42bc2acb2f0
font_01_sfnt_off0000830c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBD 18416 bytes
SHA-256: 9b1b86d518bbcbecce2ac7037f2b10fa6fa9b3d2e28cf0c2cd03817ae8459785

Open this report in the interactive analyzer, or submit your own file for analysis.