Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dfddc127dd46a6…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 18:58:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fc325376e8754b853292a2e485eb7caa SHA-1: 100d4ba56ddb7561056b51507f5ec96df43c5d3f SHA-256: 47dfddc127dd46a683ae5fcb736e43a0c326bf694a323b585c1f6212056ce9b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to a malicious redirector, masquerading as an offer for free game currency or hacks. The document body and heuristic firings confirm the intent to lure users to this malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/earn-robux-for-free-offers-game-hack In PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-escape-room-theater-cheats_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-infinite-jump-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/i-caught-my-mom-cheating-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/pokemon-go-free-balls-code_GM1094591345.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-blox-pice-hacks_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-robux_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/robux-download_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-coin-master-hack-no-verification_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_off00003341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3341 22600 bytes
SHA-256: 522aa59a18b7d227c9d069a98ed2ac4cbfcf6249860d721c2f748dc9250903eb
font_01_sfnt_off000065b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B6 18716 bytes
SHA-256: 85710b180733f3ad24f951d14db1b1c6b1fc92ce2ecbf3837c237c10da78cda1