Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2ab3ded51f249c…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 02:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ed40eaf10aaf60e1b2e4d6e91744560f SHA-1: fd9190cdace0ce915a79dcdade0bafb583eba8a8 SHA-256: 9a2ab3ded51f249cdd95e6db70da8ca5b9a361e0e81bac82f7e0395492352e44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating an attempt to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links and the document's purpose strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/roblox-free-accessories-game-hack In PDF document text
    • http://restarmenia.com/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://restarmenia.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://restarmenia.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://restarmenia.com/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://restarmenia.com/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://restarmenia.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://restarmenia.com/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/mcpe_GM479516143.pdfIn PDF document text
    • http://restarmenia.com/images/free-robux-survey_GM431946152.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
stream_003_off0000488a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488A 27236 bytes
SHA-256: 156d3f6babde5b332fa2e721c92f9a9cca237f8e7f5588bc9b492598e5b8f7d3
font_01_sfnt_off000086aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AA 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000906b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906B 18068 bytes
SHA-256: 631d65c1f3e2a0dc4ab1c15de4169549fc1962130d484212c2774f26f0b2a84d

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