Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62381273d7b6d35…

MALICIOUS

PDF

43.6 KB Created: 2021-05-19 21:53:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 871301e946917d0aa70703f698fca159 SHA-1: c8080098534787cd3f67c296abe1e132972a9bd7 SHA-256: c62381273d7b6d3550642143a42fd84b4d8a745742161f5b8b7ecceb8732abf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures related to game hacks and free in-game currency. The primary malicious link identified is https://netcdn.xyz/app/406889139/moonactive-coin-master-game-hack. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/moonactive-coin-master-game-hack In PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-pet-food_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_003_off00004c0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0A 30204 bytes
SHA-256: ad8a674efdeed51a25862a7a550dbb098eeed84c0490b04515a1adc9431fe6de
font_01_sfnt_off000089f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 17660 bytes
SHA-256: 54ebc39010e93fb8f764eb9b1a3ef964e9d80d147d904f4e34bed2a832e067e1

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