Malicious PDF — malware analysis report

Static analysis result for SHA-256 47756a1875a9f1ec…

MALICIOUS

PDF

35.8 KB Created: 2021-06-20 22:20:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b1d2c09845c57ca7dc751c57a474fb3d SHA-1: c32a540eb7f3efc2976739b07613146f0ef04816 SHA-256: 47756a1875a9f1ecf02ae31279a283ccba69389bcc1f137a453081949394a8f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body and heuristics indicate a lure for users to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-free-robux-no-human-verification-no-survey-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-for-joining-groups_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-brown-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-base-raiders-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-no-eyes-no_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-everything-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off000032df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF 22460 bytes
SHA-256: e7aed7cabeed2551311685954cf7e3ef9b8fec7181b7e4098779b2fe767e618c
font_01_sfnt_off000064b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 19792 bytes
SHA-256: 4e141d0f5a4bf380e6b5a75ed982a0487b448ae58dc8af62101b98d1b5e62a68

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