Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf65322671470f5…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 19:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ac38a2a7ab1cafe9abe449fa49a2d4b1 SHA-1: 30646b557f08e26252630fe0ea9270099b3e1bb4 SHA-256: 3bf65322671470f517d16819f7003351beb53ec398d6eb62d1e2e1b6fa4978d6
82 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, many of which are related to game hacking and free in-game currency. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically identifies this pattern. The ML classifier also strongly indicated maliciousness. The document likely aims to lure users into clicking these links, potentially leading to malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/how-to-hack-itno-someones-account-on-roblox-game-hack PDF link annotation
    • http://unilin21.ru/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-hack-in-roblox-got-talent_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/bandit-roblox-free_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/where-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-make-a-free-model-roblox-2021_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://unilin21.ru/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/cone-master_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-robux-instantly-no-survey_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-get-free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7F 22424 bytes
SHA-256: 8c4d7cdb92a16cff79af10c4042e5945e24575e438717bdfc04d99821648b120
font_01_sfnt_off00005e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 19136 bytes
SHA-256: de43d069df214f3d597da99ad41755d59d53fedb8ef8b669580b30591328ca13

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