Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce82bdb1da0e9e7…

MALICIOUS

PDF

49.6 KB Created: 2021-05-11 00:07:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 18b9f93d657424738cec7a61342b0968 SHA-1: e46fcd0ed22eacf7588ec76f823166b1684123b7 SHA-256: 1ce82bdb1da0e9e78225a7e11f4eaec99a275be9afb1e3bd2af78409e972bc6e
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 0.8642

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.xyz/app/431946152/how-to-get-free-robux-on-chromebook-game-hack PDF link annotation
    • http://moneymaker-gold.de/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/robux-app_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497D 26964 bytes
SHA-256: 9ff8717bf82be633171bb9a5d940a88bd02501b28e75d9442d6f49b50031902b
font_01_sfnt_off0000873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000090e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E7 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D8F 18880 bytes
SHA-256: cfbdee24d7402b99052158ce8ccd316620959aaec27a5d82eaae160d81e49f1b

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