Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c129b2d6f71aa6…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 16:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0e76954e0d765e4fc067a6fb5898a71 SHA-1: 4cfbeff671af179fb6682d2eeb4e92e50a17cb71 SHA-256: 56c129b2d6f71aa6e96f60b69a43ce8fd748b860631b4424559ecfd2dfeb3735
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple embedded links that redirect to known malicious infrastructure, disguised as game-related content like 'free generator' or 'game hack'. The primary lure appears to be related to PUBG UC and Coin Master, aiming to trick users into clicking through to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1330123889/pubg-uc-logo-png-game-hack In PDF document text
    • http://io24.com.ar/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-without-survey_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004675.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4675 25092 bytes
SHA-256: e4026aaec48cf186af726011fd96790b6790cc8ab5ef7baba3ada521103a01c5
font_01_sfnt_off00007fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 18040 bytes
SHA-256: ad23ac1f6f94fdb7f7caaf52569057f6cea5742556dfe0a3e7cb8ea1a8ee4f70

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