Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a42e6131a1b7f55…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 14:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d97b58e51ac4e1209ad73153bd08c1fd SHA-1: 9c4c2996026077bd6c6213a595acb8f6f356b05f SHA-256: 5a42e6131a1b7f55d974ef8a56d1332b88dbc7c31a429c56a25868cfcfe0f7aa
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary link, https://netcdn.xyz/app/479516143/minecraft-for-ipad-free-game-hack, is associated with a high-severity heuristic for game hack redirects. The document also contains instructions for password-protected archives, a tactic often used to bypass security scans. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.xyz/app/479516143/minecraft-for-ipad-free-game-hack PDF link annotation
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/get-free-spins-coin-master-link_GM406889139.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_002_off00003494.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3494 24964 bytes
SHA-256: 991386b954a03dbfb43383bb595646a91187ebc796cd4590cea546295dd2e169
font_01_sfnt_off00006db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB3 18060 bytes
SHA-256: e7041c736bb680ef9c5afd20c9d1b3857fb6e2c22e525da80690d2251a0ac91e

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