Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbab9114d6c7a8e…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 15:24:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 99b77533cfd72e9f5edb18056697105c SHA-1: 52b36b0eff286c0fdab01b3eee1293201f25c3f2 SHA-256: ebbab9114d6c7a8e1123ad52adf684d972bfe304ddc78b44044c7ffebafefec2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically targeting users with lures for game hacks and free items. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-free-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/hack-coin-master-free-spins-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pubg-600-uc-redeem-code_GM1330123889.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_004_off00004fac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAC 25044 bytes
SHA-256: 6d258184ef2d7104408c516b0be376133c33ee764dc585783edc8e40a3d76c4a
font_01_sfnt_off00008962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8962 18056 bytes
SHA-256: f90826bfe2bc71c0265d319a9184b169c06436e7d3915f152a6a7ecd0e51099f

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