Malicious PDF — malware analysis report

Static analysis result for SHA-256 848a3d0372211f17…

MALICIOUS

PDF

57.7 KB Created: 2021-06-11 01:39:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 529f1662705fbfbdf198b87d1487ea9a SHA-1: afa28a68dac184cf1cd4ac782f58e54b2eb7e368 SHA-256: 848a3d0372211f174c3e8c6ef94db6b7afd3c43d3a5eff16161e6c64da6275af
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document employs a fake CAPTCHA and brand impersonation lure, specifically targeting Outlook users, to entice them into clicking a malicious link. This link, https://netcdn.tw/app/431946152/face-made-when-roblox-was-hacked-game-hack, redirects to a 'game hack' generator, a common pretext for credential phishing or further malware delivery. The document's content and heuristics strongly suggest a malicious intent to deceive the user into executing a harmful action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9611

Heuristics 6

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/face-made-when-roblox-was-hacked-game-hack.
  • 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/face-made-when-roblox-was-hacked-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/tiktok-free-crunchyroll_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/tiktok-free-google-home-mini_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/pastebin-free-robux-100-works_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-much-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free4now-info-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-for-kids_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A6 29688 bytes
SHA-256: 1c8e9a20e3b13347007508f569f3987c434ca35279da72ff8847fe2a815b7b7f
font_01_sfnt_off00009535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9535 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off0000afff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000bd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD11 19080 bytes
SHA-256: 609be02c94e2593ad7acb0cde434990c91682b5cabac97f128f289bb557808e4

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