Malicious PDF — malware analysis report

Static analysis result for SHA-256 553ba791116f26e4…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 08:57:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed71d546179539a66bd5482cccc578b2 SHA-1: d77c94a261055ce3edde9d9fe7d0a07338117b56 SHA-256: 553ba791116f26e4e2b149606afc696ffded1c9231dd6549522835a79d5a296e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake 'free generator' or 'game hack' that redirects users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/completed-coin-master-hack-game-hack In PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/login-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004710.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4710 24944 bytes
SHA-256: a85b5a17f857064e878e2ebf5d34e02142c96765f4fcb07ecbd301da80fd0bfe
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 18400 bytes
SHA-256: 797855796ad56610e81a33532725bd96b3cb453fd24eae28a344109feab08f19

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