Malicious PDF — malware analysis report

Static analysis result for SHA-256 441e4ec2a2244875…

MALICIOUS

PDF

40.6 KB Created: 2021-05-18 00:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b0f6b9b05b7ff4ac9b46dc566afbfe03 SHA-1: 1032773865b6b28fea542798c0bf7a6b8c5a704d SHA-256: 441e4ec2a2244875d942b23acf7624234adf7520b9b5d4c0b5fceb5bb85b8d28
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks, specifically 'Easy Coin Master Hack', to entice users. It contains an embedded URI that redirects to a malicious URL, likely serving as a landing page for a scam or further malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/easy-coin-master-hack-game-hack PDF link annotation
    • http://unsere-beagles.de/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/robux-page_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/wurst_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/hack-to-protect-village-on-coin-master_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_003_off000046bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BC 24008 bytes
SHA-256: d42d007ca4c91f5a2e0d04646cf50e9993c7d8f36b634788e67c2895eb4db59e
font_01_sfnt_off00007d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 17896 bytes
SHA-256: ba60f7dc4dc0ecf7241d3317d5b60c2aa3f605eaa21fa41e19c1a36889685198

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