Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d991c48dd38b896…

MALICIOUS

PDF

33.3 KB Created: 2021-07-08 05:22:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e6ca6b04bdb9453e8c8e9446197ec406 SHA-1: 56c2ba0f707c5c4c18d526482e8185cfb898e21b SHA-256: 5d991c48dd38b896e973b7e2071668ae439b063099cde043f841ef5139ddb756
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as free game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of a visual download button further supports a social engineering lure. The document's content and embedded URLs suggest a phishing or scam attempt to trick users into visiting malicious sites.

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.tw/app/431946152/free-group-roblox-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-face-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-hack-gui-download_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-paypal-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-how-to-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/robux-hack-free-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/i-hacked-into-roblox-omg_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-paintball-hack_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-do-you-get-free-robux-without-human-verification_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_off00002d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D79 21660 bytes
SHA-256: ece1d6774d9af0d05800ac4786fcebdeee00b99494cf44959029fbb975e13c01
font_01_sfnt_off00005d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 18968 bytes
SHA-256: 57604ea57d62e2aa634e965ec5800ebb3da15d6ae68f920e4611ad7eaaeb6114

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