Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d957cd620576a19…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 11:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5e998e20b35bbd7145f43f3aab160c28 SHA-1: 4cf32795bff384fe7bb1be93f632ac6143a9d5d9 SHA-256: 2d957cd620576a19dc6ed44302dc1152b537941d84502b1ef9deab4add278583
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to the URL https://netcdn.online/app/406889139/free-coins-app-for-coin-master-game-hack. The document body and embedded links reinforce this theme, suggesting a social engineering tactic to trick users into visiting malicious sites. While no scripts were directly extracted, the PDF structure and embedded links suggest potential for exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/free-coins-app-for-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-without-verification_GM431946152.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_004_off0000516b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516B 24412 bytes
SHA-256: 6cc23b1dc12b238fe84323ea36266b93792d2b29a3b4a0ec87d893a5319c95be
font_01_sfnt_off000088af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AF 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 17884 bytes
SHA-256: 783aaa6655ee4cc9bd4a656e8e37c8d4eb14647635af9e14ecd033d001f0503d

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