Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b16808ebd56c2a9…

MALICIOUS

PDF

44.1 KB Created: 2021-05-19 22:41:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b19748718f5032869a3c29d945cf5e88 SHA-1: c5a4c07c3169f5905d6ebad9c2b2d55ad7997d35 SHA-256: 1b16808ebd56c2a99f29940e0467b7e58459a32937734a38fc635a985ffb9d10
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 0.9976

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-zone-free-robux-game-hack PDF link annotation
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-do-you-install-minecraft-for-free_GM479516143.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_off00004c4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4C 27808 bytes
SHA-256: 0e27d06b09f3db691c8cfc04b3282e49b7de841dbf3b6662a8908c0c19b1381d
font_01_sfnt_off00008aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA9 18180 bytes
SHA-256: fa0bfd9229dff732b79349aec0b82eb394b94074e398d1bd7575aad3963e16a1

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