Malicious PDF — malware analysis report

Static analysis result for SHA-256 682f11126ce78400…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 22:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da7f75b29cb6dca91daaefc767bdee64 SHA-1: 2ce7f76e9de6a6ccdc651801660ab3ad2869f264 SHA-256: 682f11126ce78400f13339052dbe8a1b5a3ceaddac1f4d50345180a60c6b2f3e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for malicious JavaScript execution or redirection to a phishing or malware download site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/www-robux-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coins_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_004_off00004f5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5E 25188 bytes
SHA-256: ff15bc2098ab6e7b66747cf6f4d7084be3723910069ea5286c7177e0c46bf6d1
font_01_sfnt_off00008948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8948 18212 bytes
SHA-256: bcccb1e001e2f5e7ef72a5433eb4dc11bdbc574927e5f5e748e53d7576d93cee

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