Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afe99bc46e250fa…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 05:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1daddaeec2d6f71f76d0a156d6b4631d SHA-1: 611bf54e6a8b7de97977bcd01041340c3c567406 SHA-256: 6afe99bc46e250fa1a37242d27ea8c72d4105ad3dc093af7f607978c904ec49b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The primary lure is the URL http://netcdn.tw/app/406889139/coin-master-hack-ios-game-hack, which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

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-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-speed-simulator-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-promo-code-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/emergency-response-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-ios-hack-tool_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-rs-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-verification-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/wheel-decide-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-codes-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-jailbreak-hack-unjailbreak-script_GM431946152.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
font_00_sfnt_off00002f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F34 22888 bytes
SHA-256: 68186b6ef66d9da72026450b19be61ed759d9269fbd53ff7f5fad3f769f084cc
font_01_sfnt_off00006267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 18004 bytes
SHA-256: f707d2c5311b1c23f03cdd9efaf3cc277ed0340dfe459cceb48b9dada5dc554b

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