Malicious PDF — malware analysis report

Static analysis result for SHA-256 f455d9e3e51efdd9…

MALICIOUS

PDF

45.0 KB Created: 2021-05-10 20:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6edb0f5a2be19d24a8d4b219bac7e2bf SHA-1: 4e8c85455b358eba479ca61f51edc6c0823391ca SHA-256: f455d9e3e51efdd974e5af43295be948c158c1e4dee0cc1285449c4ed475e1da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious domains, disguised as offers for free game items and hacks. The document body explicitly mentions 'Free Robux Without Verification Or Survey' and includes a primary malicious URL. The presence of embedded URLs and a malicious redirector link strongly suggests a phishing or scam attempt designed to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/free-robux-without-verification-or-survey-game-hack In PDF document text
    • http://mohacad.hu/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000494b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x494B 23960 bytes
SHA-256: 6ade6274e970e2487e9b35fb14d8131c4d61e63b2a115c3aba0e7e6b27e2acde
font_01_sfnt_off00008085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off00008a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2C 19256 bytes
SHA-256: e141b644a4ecfde99000ea6fb335fe57c508717aca49a84e1609c2cc829300c4

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