Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d2b72fb46b2aa8…

MALICIOUS

PDF

47.5 KB Created: 2021-06-07 17:44:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: badb3786dc06f34b2341e264a075ede5 SHA-1: 11369fd23fc38ae6d217a55d1f8558e201c97750 SHA-256: b6d2b72fb46b2aa81f6a1a80e8b3d586c01510f96898017c67115f12e2e7ea6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common social engineering tactic by using game-related lures to entice users. It contains multiple embedded URLs that redirect to external sites, likely serving as a distribution point for malware or phishing content. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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 https://netcdn.tw/app/431946152/roblox-free-bc-2021-game-hack PDF link annotation
    • http://eltisstudio.sk/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-20-download-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-do-i-do-if-i-was-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/como-hackear-coin-master-2021_GM406889139.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
stream_004_off00005b3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5B3B 25744 bytes
SHA-256: 8483790ecb862a3d1a8d7bc34edb2d92c030aeb7c8b8b11818790ee2ea26dc5e
font_01_sfnt_off000096e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E8 18352 bytes
SHA-256: cceeadf02137de23e027539d489272c8674642ff597e31dcd7f9e461a2705784

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