Malicious PDF — malware analysis report

Static analysis result for SHA-256 db16a5d8a30f4a35…

MALICIOUS

PDF

48.2 KB Created: 2021-06-08 11:47:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3cedc39fa051220eda946dfc583f43b SHA-1: 1d90d99fc231011aa4e3207628ed0f7b9dcccf50 SHA-256: db16a5d8a30f4a35cf956f3a9dbf333f902bfba80ab52aaffedf8af78113fe89
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/como-hackear-roblox-y-tener-robux-infinitos-game-hack PDF link annotation
    • http://jasperfirstumc.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/2021-promo-code-for-free-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/get-free-spins-coin-master_GM406889139.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_004_off000053c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C1 25384 bytes
SHA-256: 9e4db48dadc287a8cde6502790537cc6da1c98422574b43e2c974b55e289ecbd
font_01_sfnt_off00008e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000097c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C1 18968 bytes
SHA-256: 2727e65a5aa4e045de6c2e3407e245968b04007d50c19a4dc3cb06c974af1d16

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