Malicious PDF — malware analysis report

Static analysis result for SHA-256 007c4453a3faab3b…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 02:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 04898fcfcac30577350a87ff068e48d6 SHA-1: d0042b3ed5a5bfb68770595b2cb532cbaaf1a132 SHA-256: 007c4453a3faab3ba175b3b0d017ee8e79cd8b8fad890534e901122cb0d2c1c1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'free generator / game hack' redirector lure, pointing to a malicious URL. The document body, though partially garbled, contains text related to 'Free Robux Scams' and the same malicious URL. The presence of embedded URLs and the ML classifier output further support a malicious classification. The primary attack pattern is a social engineering lure to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/free-robux-scams-game-hack PDF link annotation
    • http://mohacad.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/robux-match_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487E 25212 bytes
SHA-256: dac5c28d2164523578e378bfa7f945a6ae8aab332056c83b5a0b3f0521b2b81d
font_01_sfnt_off000082f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F2 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00008c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 18500 bytes
SHA-256: f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1

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