Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33cef2f33de4a7d…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 14:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b1c3d3a4881bafdee3c4173b71f29f0 SHA-1: 9a3a91d87cae545cf41355838ff8b92c062c82fd SHA-256: a33cef2f33de4a7dab96cfb2087c885c34a43b1150d0de024c3a1bdcbbcbd378
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 0.9865

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/479516143/free-minecraft-generator-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/2021-free-coin-master-spins_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_off00005164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5164 25296 bytes
SHA-256: 6cc612af085446a56ed2aa32a784aa8fbe914772b93156ad1e711313c0af6ccf
font_01_sfnt_off00008bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDA 17712 bytes
SHA-256: 2ba423467bb34654934421079a82fe93ae3f0cf8ad50d4b3792d5c3eca35bf12

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