Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e23fd992ebf6136…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 19:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8d579e4b3b42b2e38d3a4f62dbbff195 SHA-1: 847497627dcf9faf8917664a9c0532d43f61a932 SHA-256: 8e23fd992ebf61361fd48c7e7467ce73ee12cd02dd619bb2ccff107904cd05ea
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external sites, masquerading as game hacks and generators. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-coins-link-2021-today-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-free-coins-link-2021-today-game-hack In PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-hack-on-roblox-little-angels-daycare-v10_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/ww-roblox-cheat-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-free-robux-from-bloxmarket_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/codes-for-hacking-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-hacks-on-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
stream_002_off0000317f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317F 23104 bytes
SHA-256: 61318cc3af80a7151386159eb7a1c83a9d1992861db7910c00a240d19e1c7001
font_01_sfnt_off000065bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 18924 bytes
SHA-256: 9de0cd144d01747faee9598eb41490a3121b78bc3e8aa19ce2f97cd77f13f1f7

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