Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b20f23078eee65…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 20:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 026194749fd3d1203b87bc54ca9cad65 SHA-1: 49393313f921ac359cb8e6ebf44fc8e034684a50 SHA-256: b0b20f23078eee654467b1c77f64814a120cc623a2510d084027478ea4d9f36a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure appears to be a 'Coin Master Hack' which leads to the netcdn.tw domain. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially malicious sites. The ML classifier also flagged this document with high confidence.

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-hack-ios-12-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-hacking-website-no-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/1-1-1-1-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/actual-hack-generator-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/btools-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-easy-way-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pig-master-coin-master-free-spin_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
stream_002_off0000305d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x305D 22712 bytes
SHA-256: 88ce1e70c3ba607aed65384acc5a4fab6b1ab01d4264ddfba9000bd1492a236b
font_01_sfnt_off00006341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 18232 bytes
SHA-256: c9eabdb7d8b452980fc992ffbb4cf4140e100a7cb8043d719b8152402848e971

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