Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f82f3ed0e0617f0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 12:20:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 98c944fc5f2c05a1e6f6599b7973ca76 SHA-1: 4c1e1799e13ccb382ff37168bfc691144fae4371 SHA-256: 3f82f3ed0e0617f0ea17dc0e1aa42445704155ddb1a3d298f6e4c4d4a4b679a6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links that redirect to websites offering game hacks and free currency, a common lure for phishing or malware distribution. The heuristic firings indicate these links point to known malicious redirectors and game hack lures. The document body and embedded URLs suggest the primary goal is to trick users into visiting these malicious sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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/431946152/huskybuckscom-free-robux-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-inject-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-speed-hack-youtube_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-those-who-remain-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-robux-robux-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-without-getting-banned_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-hacks-counterbloxrobloxofensibe_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-outfits-for-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-gift-card-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/criminals-vs-swat-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/ash-shirt-kalos-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/pain-exist-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/www-roblox-com-robux-free_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_off0000320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320F 22164 bytes
SHA-256: 20762f6c328ad7a833571b33fcaef2dccfe032c0959a6c140ba6d93f2e6193c4
font_01_sfnt_off000062f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 19324 bytes
SHA-256: fa71a02eff7d38361fd0194e941a22015f12e2817721f9ddba48d3de862e217b

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