Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8135fee16c8cd76…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 01:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b972d450b0af970c03bb3a2cd141701b SHA-1: fc180ea5642e47ce8e43281389d202c1bc0612d2 SHA-256: a8135fee16c8cd76f868a9b053b1119f977c773f03a4dbb61cd2476809be3484
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and hosts further malicious PDF files, masquerading as game hacks and generators. The document body and embedded links explicitly promote 'Coin Master Free Spins Generator' and 'Roblox Hacks', indicating a lure for users seeking cheats or exploits. The presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

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/406889139/coin-master-free-spins-generator-game-hack In PDF document text
    • http://librarysenior.com/repository/jailbreak-roblox-hack-mac_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/tiktok-unicorn-free-download_GM835599320.pdfIn PDF document text
    • http://librarysenior.com//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/best-roblox-hacks-for-unfiltered-games_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-more_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-cards_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
font_00_sfnt_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 22412 bytes
SHA-256: 803d67579f8e9207d46e4e22d2838b7b22e5cf14c6092037494c097e1d964f32
font_01_sfnt_off0000640f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 18176 bytes
SHA-256: 220cc08b156a25e7f0738aa2ffed122a04d3b7eef92f96fc2d602fbd09f3cf7b

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