Malicious PDF — malware analysis report

Static analysis result for SHA-256 e253f82588a1b57e…

MALICIOUS

PDF

46.6 KB Created: 2021-06-04 05:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3958104ed30835aaa1d2a3e2fd970441 SHA-1: d8ae90d74691a3cfcbf99d7ca9de5aa0d967ddb7 SHA-256: e253f82588a1b57e650d85126e2835bada047334f73239363c4157bfcd25f05e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9748

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/how-to-play-coin-master-game-hack PDF link annotation
    • http://library.polita.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/nbc-roblox-free-accounts_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/tiktok-free-pc-download_GM835599320.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000511b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 24888 bytes
SHA-256: 2ae77a7ac702647f7e1cf6dc85b02f94c1e24d94446d519e22fb39aea9eeb807
font_01_sfnt_off000089fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FC 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000093af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93AF 18116 bytes
SHA-256: 0e8b5a9117de41a6d4fd5ecb0cd728d284290b6e916b566678616dac1dce6f04

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