Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7d8d367c62a6cd…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 09:43:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 63637d364d3e46309d3a8402ca7767fc SHA-1: 9d9678771409735fa0c499b1aa6c707cbb9578b7 SHA-256: ad7d8d367c62a6cd58589dec33aacdf17962e727dc2635eb4cd22bc5036b00cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors and lures users with 'game hack' and 'free generator' themes, indicating a phishing or malware distribution attempt. The document body and heuristics confirm the presence of embedded URLs designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the nature of the links suggests a download or redirection to a second-stage payload.

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.co/app/431946152/cheat-engine-not-working-in-roblox-game-hack In PDF document text
    • https://key8013805.com.tw/upload/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/ninja-legends-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-roblox-and-get-infinite-health-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-24-02-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/pig-master-coin-master-free-spin_GM406889139.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_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22140 bytes
SHA-256: cd5ed75bbf0f0039f74d6ccc98fd49bdf61e437b06c272a67fc6083d5ada09cf
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 19244 bytes
SHA-256: cedd0ec50b04c36c1e3994d921ea8155e36cea56eaaef1b753f38d717eaa15eb

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