Malicious PDF — malware analysis report

Static analysis result for SHA-256 003199e2a2beebf0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 01:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 073308cb8b3394bfc3c5f5307b16f03e SHA-1: dc2fdce07c9f16f0a4f496a16cc0105b881c1568 SHA-256: 003199e2a2beebf0d2b24a95f0bc0fb401ec6dc45af2b7e2fb4647c80ec98abd
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to redirector infrastructure and potentially malicious files, disguised as game hacks and generators. The primary link directs to 'netcdn.tw', which is flagged as a malicious redirector. The document body and heuristics indicate a lure to download further content, likely a second-stage payload.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/hack-roblox-admin-tool-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-umbrella-on-camping-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-cheat-speed-simulator-2_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-rush_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-aimbot-cheat-engine_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/get-free-robux-codes-email_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-hack-roblox-robux-with-cmd_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/denis-daily-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn macro / runtime command snippet
    • https://sponajaib.com/ckfinder/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfilesIn macro / runtime command snippet
    • https://www.roblox.com/.IIn 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_off00003300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3300 22336 bytes
SHA-256: c321ae405c2aa5522a2fd8a754b9b54ef0ff1f69e17259216627949ad71ed4ec
font_01_sfnt_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 19208 bytes
SHA-256: 93e7e893a2bfc39c3f7573aa2126af9029caba87f3c647683b70cb3d14306e0c

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