Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d41cc88132b0fb…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 11:41:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 53218136f8c6305e2a3524a7a2bb1a66 SHA-1: 3ad81d3501e5d097db6425fcd192f6d749b919a7 SHA-256: e1d41cc88132b0fb7c54091a2c49b47416fab5e1433c8aa7dae2244d26234bb9
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/coin-master-apk-hack-35-8-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-free-zekrom_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/cute-free-hair-on-roblox_GM431946152.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_off00004d44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D44 25928 bytes
SHA-256: 6878bacd55de6ee6436d311b9ee4706766432add7f11c886b8a6b09e57d35c03
font_01_sfnt_off000088ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000926d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926D 18412 bytes
SHA-256: 4c8d04635ee7aab9f040781324f23cd99e69f5aee42c948ed1ea0c23ee45676b

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