Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac04aa5564cc9ec…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 17:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cffb0f017e4cf91afd1908790d677e9c SHA-1: 52f5c0e2534f63f47cc198382a5b5ad6229afa92 SHA-256: 8ac04aa5564cc9ec58e06d30d2bc81413a7bb1e1634f435e949d56e438641b68
160 Risk Score

Malware Insights

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

This PDF document employs a lure for free Robux and game hacks, directing users to a known malicious redirector. The document contains multiple embedded URLs that likely lead to further malicious content or phishing pages. The presence of a visual download button and the overall structure suggest an attempt to trick the user into clicking through to a compromised site, potentially for credential harvesting or malware delivery.

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-robux-generator-codes-game-hack In PDF document text
    • http://razredna-nastava.net/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-dance-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-nike-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/prison-breaker-16-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-memes_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-ways-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-without-human-verification-real_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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 22360 bytes
SHA-256: 138f3f840ad877768552b9b96f65cc5eb8ae7c52008a497003bc276361b5fe98
font_01_sfnt_off000062b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 18996 bytes
SHA-256: 91c816d1018d58562acf1f6be5737a46a508402ca9fb9bb64fdd640b276a109f

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