Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d63308a8c2165bf…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 13:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c688f031ad039a6fda7c06396e82b2b7 SHA-1: e6ae03c0d2b52d7a8752e235cbb2dca39812474b SHA-256: 0d63308a8c2165bf5565765b21a8cc660599b30037216b4f2cf333e4def807fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generators" for popular games. The primary lure is a link to 'coin-master-free-spin-and-coin-game-hack', which is hosted on infrastructure associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spin-and-coin-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-to-watch_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/real-hack-for-coin-master_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
stream_004_off0000546d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x546D 24804 bytes
SHA-256: 9199385448399160383f9fd02ad590f9c1ad8b00f57db096d3df4b80fd9ad092
font_01_sfnt_off00008c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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