Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5592d64c3e3876…

MALICIOUS

PDF

30.3 KB Created: 2021-07-06 09:20:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bd33b41e44fe753c8bd2f7702e787158 SHA-1: a528a4e831e3ce0044a3e17852e911f8031b4fa3 SHA-256: 9d5592d64c3e3876941170beffd120a333b53848d583bf6334341445d245d9f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically a site offering a 'free generator / game hack'. This is a common lure to trick users into visiting potentially harmful websites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • 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.
  • 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/robloxfun-com-generator-game-hack In PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/robloxcom-free-bc_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/pokemon-go-free-yveltal_GM1094591345.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/free-roblox-royale-high_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/https-webrobloxcom-free-robux-sortfilter-defaulttimefilter-0_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/hack-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-get-5-free-robux-doing-nothing_GM431946152.pdfIn PDF document text
    • https://quatangphongthuy.vn/upload/UploadFiles/files/free-woman-face-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C28 22392 bytes
SHA-256: f65eea49587a2617df539d0575caed88b79613c04676a0b108024bb32344327e