Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d2d266a83fa4b7…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 04:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2c1ca870b3fea942b7f6c5691f9ebb83 SHA-1: 779ae1f099c16be1474b65dc98b95f7ee7b05af8 SHA-256: d9d2d266a83fa4b7b0cc11fb946db021ccb595641a1ac5a40c23933e94b5fd73
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users to potentially malicious websites, masquerading as generators for in-game currency or hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-games-that-actually-work-game-hack, is identified as a malicious redirector. The document's structure and content suggest it is part of a campaign to distribute malware or conduct phishing through deceptive links.

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/free-robux-games-that-actually-work-game-hack In PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/roblox-free-muscle-t-shirt_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-your-roblox-account_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/cheats-for-roblox-realistic-roleplay_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/btools-roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-jurassic-world-headphones-roblox_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/roblox-westover-hacks_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/roblox-free-items-2021-codes_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/2021-free-robux_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-robux-gift-codes_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/2021-hacks-for-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/bloxburg-free-robux_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-group-roblox_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_off0000320e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320E 22036 bytes
SHA-256: 248a3b5bcf9e6fd913664ac8110209430293fe790b8c198a37d6dc0e9bee137c
font_01_sfnt_off000062cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 19868 bytes
SHA-256: d6d6c21ebfb94ec66429bf50c50e6ebacf9910fb21d66d19805e4ed0a6b06ac7

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