Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a4f838c51f40c2…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 14:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6c2e2caaf4847d6441eb0b378e4a890 SHA-1: abec90a700eb026f414e6cc5b8b8333aa3a21019 SHA-256: 42a4f838c51f40c2ac8591b083a0cb400bd80844cc2da6eeb065bf305cd9db6b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-march-2021-game-hack PDF link annotation
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-player-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-ghost-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-free-clothes-no-robux-of-freinds_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-gui-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/can-i-seel-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-draw-alpha-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-redeem-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-roblox-promotions_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hacking-gui-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/hackear-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/hackear-el-roblox-med-city-noma_GM431946152.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_002_off00003193.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3193 22988 bytes
SHA-256: 277d28b74a1ff14c8b0f87745cf048c5e2056dc860038c169bac500ba3f8fda9
font_01_sfnt_off00006514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 19336 bytes
SHA-256: 2e56a502e2927368c1cc12523f1bd1a6faa0977f7c211f318fda6d68b73b847f

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