Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0789e09110749fa…

MALICIOUS

PDF

51.4 KB Created: 2021-06-11 13:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9cf426aa8109bd90d2b274dd4c1ee1b2 SHA-1: b694f725b8517a8faf60a7b1a6d32326ff68f9f0 SHA-256: f0789e09110749faccf8b220509270d287df3e1611e0b691efc91b3a8d8fa58b
160 Risk Score

Malware Insights

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

The PDF contains links to known malicious redirectors, specifically promoting 'game hacks' and 'promocode hacks' to lure users. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites that may host further exploits or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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 https://netcdn.tw/app/431946152/pastebin-com-roblox-promocode-hack-2021-game-hack In PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roblox-password-cracker_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-rare-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-items-that-are-now-expire-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/como-distruir-juegos-en-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-rifle-script-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000532c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532C 30024 bytes
SHA-256: b423ceba7fad10e2e83532370d83ad481c2d7ac0eeb6c41c2a5a04305a9fbc8a
font_01_sfnt_off00009650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9650 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off0000a2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D7 19396 bytes
SHA-256: e9272eccb7db933cac5229af7ade0cd979f1e9e95f264ee03b0866cc1d2dca45

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