Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72cd5243eb8444d…

MALICIOUS

PDF

45.0 KB Created: 2021-06-07 00:49:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 38f58b872e3a70a4158a3fe259c7f93f SHA-1: a7750c102ef24d5019af291027f8f86d03e0a08a SHA-256: e72cd5243eb8444dc7aaa51995ff23f48d52f4de57cf88fd7a66193126d0a119
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 0.9865

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.tw/app/431946152/omg-free-robux-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-to-play-guide_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/tiktok-free-anime-websites_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/10-robux_GM431946152.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_004_off000051ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CE 25352 bytes
SHA-256: 7ecb00fbe8a47d980e5088e1bd147c5baa7737ab922f5472dbf760980ff68c05
font_01_sfnt_off00008ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA2 18560 bytes
SHA-256: f347875bf9aef10ed75979d72934b0689f0a230d749c64d45302609bc608b68d

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