Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fcc733576dce38…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 18:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7b258cfa9ee1775134fbf9e0fff2f0e9 SHA-1: 62449c222cc8f1f03a23a87a70dadf2a7c6987e2 SHA-256: 34fcc733576dce38e36cfb7e08dde89958e98e5e7d0dc67b6c48a7c9c1ebd1c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link to 'netcdn.tw' identified as a malicious redirector. The document body and heuristics indicate a lure related to game hacks and free currency, likely designed to trick users into visiting malicious sites. The presence of embedded URLs and the nature of the lure suggest this file is part of a phishing or malware distribution campaign.

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/how-to-hack-roblox-to-get-free-robux-game-hack In PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/get-free-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/auto-clicker-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/pubg-uc-seller-pakistan_GM1330123889.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/do-you-want-free-robux-get-unlimited-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/big-brother-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/robux-hacker-2021_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/robux-cheats-2021_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.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_off00003536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3536 22612 bytes
SHA-256: d5a7f95e791e53fc9b33d026fa4c34a0b5406a1c4d1e713929d08d5b2123c302
font_01_sfnt_off00006791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 19228 bytes
SHA-256: bcb228600d1876164d47ff19adbc225d1b3379d908d021e666a2e799a71a81d1

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