Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73d94cb02308f13…

MALICIOUS

PDF

41.9 KB Created: 2021-05-17 02:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0cdb99cc785097d8108829efe39e50fa SHA-1: 5324d059293dd3d85f6c73114840ace7d20a5038 SHA-256: e73d94cb02308f138ebc8511a6cb4d5415c8a103769c738e378b25f44de9bec0
160 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 download buttons for game hacks. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-cracked-apk-free-download-game-hack, which likely serves as a lure to download further malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a social engineering 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/406889139/coin-master-cracked-apk-free-download-game-hack In PDF document text
    • http://kukuck.de/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/can-you-give-me-robux_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_off00004801.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4801 24500 bytes
SHA-256: 462bae8c900270074600ef5358fe2919e9eb557d64e171c6de51b2ee4987dd63
font_01_sfnt_off00008032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 18636 bytes
SHA-256: ce5b0e3eeaf971f653fd3a856714b5eb72d36c019aebfe22933050d37cc78532

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