Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da6dd9c5bd274c8…

MALICIOUS

PDF

51.0 KB Created: 2021-06-04 01:28:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1854d2610db56c85458f85c38ca1fafc SHA-1: 183307155e66aa145066f5d5ee8fca3ad30e338b SHA-256: 1da6dd9c5bd274c8431fa7ee961f05b61d6aa7ecbfaabcd25a1b5982b2db36a9
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 0.9713

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/431946152/how-do-you-get-free-robux-2021-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-tiktok-free-likes_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-view-iphone-ios-13_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/near-pubg-uc-code_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C3 25324 bytes
SHA-256: 64c03b30d94fb6e6ef4c41de1ac9d0db5d84a281e180779fe6e2df503365c6a9
font_01_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000094eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FD 19016 bytes
SHA-256: 7afc4835c6f8d200a546e15f78f642ba5dd88c8fac7df04bc3003dd1e9f7232a

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