Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b10188a41221fe…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 07:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2be186e2561feb7f0dc5b704487366fb SHA-1: cfc566684107e23d9257f6eb4dc05cfa9f340115 SHA-256: 52b10188a41221fe1a338de54517effc8185fe9ae5bac11291d5fc0cc1ccca90
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency or hacks, directing users to the URL https://netcdn.xyz/app/431946152/claimrbx-free-robux-game-hack. This URL is associated with a high-risk heuristic for game hack redirects. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/431946152/claimrbx-free-robux-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-minecraft-bedrock_GM479516143.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_off000047ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47EC 26188 bytes
SHA-256: 06a5fb63b148f801657440146ebbe83ebae3baeefcba326488a2658bdc08eb58
font_01_sfnt_off00008361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 18696 bytes
SHA-256: cfa2fb642045145230a20b139508f2677ace4dfe3e3be0c8823c50af7163445a

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