Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7aa8c02155c524e…

MALICIOUS

PDF

49.0 KB Created: 2021-06-09 03:25:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d6f8c16dbb07998b5b3883e7fd306c7b SHA-1: d38d641fd3890dc39e2f1c77dea5bddec9a8d0bd SHA-256: c7aa8c02155c524e3ac4ba28811aa6edccf3a6c3f5205b59f5f6f69fcb09058f
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to entice users into clicking malicious links. The document contains multiple embedded URLs that redirect to potentially malicious infrastructure, including a known redirector. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • 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/hack-dev-api-roblox-game-hack In PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-redeem-code-free_GM479516143.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_off000052a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A4 27308 bytes
SHA-256: 780563b74e6b18bc5d855a8b8e7d4f69bc8e1865ad3803346f45cc6dfe0d8c59
font_01_sfnt_off0000915a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915A 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00009b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4B 18760 bytes
SHA-256: 84cb0768e4ca3ab1852ae0e81656b905a0a001c5401b54e7899869d1f4da04cd

Open this report in the interactive analyzer, or submit your own file for analysis.