Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b8f72a8438eba8…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 08:21:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fc972e13a6e39cd58fa8ef83d20b7747 SHA-1: f46febf11cb936ffa9f7456b4c48add39ee90b20 SHA-256: 30b8f72a8438eba83546bbf24e6ecf319d3f9abd318ab107049be58b25209e74
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free Robux'. The document body and heuristics confirm the intent is to lure users to these malicious URLs, which likely serve as a gateway to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a social engineering attack.

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/how-to-get-25-robux-for-free-on-ipad-game-hack In PDF document text
    • https://iear.com.tw/image/data/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECD 22376 bytes
SHA-256: 0b39d15fc11d170bf55ffe6dc1699dfe0d421cde1e5d9cc28aeb84c46eda6b87
font_01_sfnt_off00006071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 19592 bytes
SHA-256: 903711ca17c288610d8592bef6dbef13a2a622f33aa1b5fc822a92c61a621198

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