Malicious PDF — malware analysis report

Static analysis result for SHA-256 72054db1a2e49b01…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 07:55:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8f956d43920e14b48fc22d8ae6892139 SHA-1: 55844a27f8de6dda0558353f0a7a2cd3905fd33c SHA-256: 72054db1a2e49b0133bec06d6fc51ffa695811f256ee94600ba9d68b7d0d3a00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising "free coin master hack" and "free robux" lures. These links likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs and heuristic firings clearly indicate a social engineering 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/406889139/free-coin-master-hack-no-verification-game-hack In PDF document text
    • https://ibelive.tw/image/data/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-robux-in-roblox-2021-on-windows_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/como-robar-cuentas-de-roblox-con-hacks_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-do-you-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/roblox-is-hacked-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-instant-catalog-item-roblox_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_off00003153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3153 23088 bytes
SHA-256: d954c58091f377481178397a5729f1404e632ab9f51c93e03f56403fa69b2a2f
font_01_sfnt_off000064dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 18300 bytes
SHA-256: cb2b7cb0059af51db9ca07fd0e0130e31ebff2afe995e407a7cf27ef7bb28351

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