Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7bf8baef3297d1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 20:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14bd1a401b252d04010e4fc31e930a48 SHA-1: ea58f0636c7b7cd4616c96d23f944d9f1042c8a2 SHA-256: bc7bf8baef3297d1e40e30b705dc459e2abb1490b95a5035d503807aceef7ea2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' themes. The primary link, http://netcdn.tw/app/479516143/minecraft-bedrock-hacks-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and other similar lures, suggesting an attempt to trick users into downloading or navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/479516143/minecraft-bedrock-hacks-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/assassin-2-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/new-roblox-hack-script-execution_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hacks-cheatscom_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-robux-hack-android-apk_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/tiktok-free-view-300_GM835599320.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-hack-easy-2021_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
font_00_sfnt_off000031a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A0 22176 bytes
SHA-256: bf5d0d75d85f2443ea20bcb44799e641f60aa3825bfec7b54328cacbe1638fae
font_01_sfnt_off000062c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 18560 bytes
SHA-256: bf91848bbe4a5734be67a8baa70ac7478c65c6d6f338040dd833668453e1921b

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