Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e8f9e700debc9d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 20:50:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6965e9fe7c8a69241eaf18f5a0880b79 SHA-1: 096838b58de3337875ef42b575d6906972b3fefa SHA-256: 87e8f9e700debc9dcc9f6ece1323d0c7c9b67119556ea93f1a4d155403c9e122
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting "game hacks" and "free generators". The document body and embedded URLs strongly suggest a social engineering lure designed to trick users into visiting these sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a high likelihood of further malicious activity, such as malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-daily-spin-free-game-hack In PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-generator_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_003_off000049b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B7 25280 bytes
SHA-256: 6e54a17f302490b7ac4098811abefd086d5d76f8b3bcd73da111755d557758f2
font_01_sfnt_off000082a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 18308 bytes
SHA-256: 213ea0fed5678e19eff32fcc5d46e69a4f1b73f67043b57a178cf12547108d4a

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