Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7e64adecc42f91…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 18:44:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91a883354448c7f17ef6f8c7bdadffdb SHA-1: 74e1151ad7fcaab7fa94239d51666d3be1a0b044 SHA-256: bf7e64adecc42f9198ccd0c237b75f190ad0a2a291b95cdeb644c6809beb6920
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary focus on game hacks and generators for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classifier's high confidence score suggest a malicious document designed to trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/roblox-getting-hacked-game-hack PDF link annotation
    • https://kalendarite.eu/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-blogspot_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_003_off0000486b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486B 25136 bytes
SHA-256: 210ba470317f27ee4f196d97d46b10ca4900c56e0d7f749a2ff54a4d4f3ecb36
font_01_sfnt_off000082d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 19660 bytes
SHA-256: 4db9d00189f2007cfa7e665a29d3065d4d07ef627a6cf27c22ff36cb77ba625c

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