Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3dec64e4dd09b9…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 09:00:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4d10a1262ac20fc4d31891e59d5de3ad SHA-1: 5fa1f5e4751292ce0c5c54431e76d5ff97d90bce SHA-256: 9d3dec64e4dd09b95c1198a3ea50406ea3e0c9b37ed7ca1fa7e9a9d72fb15abd
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, promising free in-game currency or hacks for popular games like Roblox and Minecraft. The primary link redirects to a known malicious infrastructure, suggesting a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to lead users to potentially harmful websites.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/apps-to-get-free-robux-game-hack In PDF document text
    • http://baxtton.com/sites/default/files/files/www-roblox-cheat-us-limited-amount-hurry-and-claim-yours_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-pants-on-roblox_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/robux-maniac-hack-for-free-pin_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-robux-on-roblox-ipad-mini_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-use-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/in-roblox-field-of-battle-how-do-you-hack_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/pubg-uc-digi_GM1330123889.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/cool-free-minecraft-skins_GM479516143.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_off00002dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC5 22392 bytes
SHA-256: 5c722d9f3b94927e051dd731b313a7d86508a53772b2196cc44351bda4f56cfa
font_01_sfnt_off00005ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBD 18996 bytes
SHA-256: 5c2d20fe84271232cdb725bf1ee573f6c2a82921a8e85a5edc805d3c36d3e91e

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