Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdc30ef8b93baae…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 11:23:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0a4e448c107cf87947a09d3d5963b12d SHA-1: 309c142582510f2dad2b6fdb65627292ea239854 SHA-256: 3cdc30ef8b93baae7cfbeeb6e0d5b65cc15d675994c33591c08dbe4b665796b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and cheats, directing users to a known malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the presence of embedded URLs and the nature of the lures indicate a malicious intent to redirect users to potentially harmful content.

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-cheats-without-verification-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/top-12-groups-on-roblox-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-treasure-hunt-app_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/youtube-you-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-and-tix-on-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/tiktok-free-gift_GM835599320.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-coin-master-spin-android_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
font_00_sfnt_off00003089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3089 23212 bytes
SHA-256: 9379d44b029ffb5b70b489d646df5aef7d5e53e864927f27250d22e4871fb526
font_01_sfnt_off000064ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 18472 bytes
SHA-256: 2357afe3a77e7c014e0703bcbd81075a5d1dab6d586aa1429deb4951cf781cee

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