Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6717213fe2be42f…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 08:32:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ba340ab08a3c5675a69881963770bbfa SHA-1: f384474fbacce6a663e1b70a4a4fffe549e7d51d SHA-256: c6717213fe2be42fb507768422c879f65bc40a76d632458ab70bd877bc66466a
200 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, disguised as "game hacks" and "free generators". The document body and heuristics indicate a lure for potentially malicious content, possibly involving a password-protected archive. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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
  • 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/406889139/coin-master-hack-using-cheat-engine-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-download-android_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_003_off00004959.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4959 25216 bytes
SHA-256: 75d39c9e79be6faa2a523cf9169c93e83ddbc8913d2e3e95e9ac8fb4f42006a3
font_01_sfnt_off000082be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 18356 bytes
SHA-256: 3b07b8a16a0acd97367c7fd615febf830525fa70158f5f56fd277e3c34c2bf5a

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