Malicious PDF — malware analysis report

Static analysis result for SHA-256 201bc3b480e832ce…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 21:49:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f5c6eead9885bb647915b8aca1060fa2 SHA-1: 5a93bec2c1af08e507e34cb2d44a47b1d0cd1bba SHA-256: 201bc3b480e832ce7100b23ead0ab816d1d79567f357e9f4da7592cd2668fb71
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game currency or hacks to entice users. It contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/best-way-to-get-free-robux-game-hack. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a download button lure further support a malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.tw/app/431946152/best-way-to-get-free-robux-game-hack In PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-do-you-get-free-robux-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-live-stream-giveaway-right-now_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/cheats-to-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-https-rbxplace_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-roblox-accounts-with-robux-2021-may_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-pin-code-hack_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-hack-into-your-roblox-accout-witout-the-password_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/google-how-do-you-get-free-robux_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
stream_002_off00002edd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EDD 22188 bytes
SHA-256: 59428529e113674715487932196ba8f22d3d2ab0d00b852094745adbb4f03501
font_01_sfnt_off00006010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6010 19196 bytes
SHA-256: 2484382544affe8c7e4aaa4b089d3f209c800c085aa3c8ec4a92e3ecd452fe92

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