Malicious PDF — malware analysis report

Static analysis result for SHA-256 853c25c8b3f2f8b2…

MALICIOUS

PDF

39.2 KB Created: 2021-05-21 02:45:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 450244b422a3f4273dd332968f7e2dc0 SHA-1: ab0cb1301af258936d12015ac9ab6b32165e2cfc SHA-256: 853c25c8b3f2f8b2e95975df512188321197b287c5c0f222ab27c5fe013494a2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering 'free generators' or 'game hacks', a common lure for malicious content. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-free-download-game-hack. While no scripts were directly extracted, the PDF structure and heuristics indicate a phishing or redirection attempt, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/minecraft-free-download-game-hack PDF link annotation
    • http://alexandergroep.nl/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_002_off000033bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BB 25416 bytes
SHA-256: 479abb392aacf9b29c197f121eb97caa85a869a96a3ab783138bb91b2308732d
font_01_sfnt_off00006dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 2896 bytes
SHA-256: d7ce0ce59bb3e08a28f605dca2e7120dc71065ebe1e0a63261ed74b9d00267d8
font_02_sfnt_off000077d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D7 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31

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