Malicious PDF — malware analysis report

Static analysis result for SHA-256 80de05e9fc00df6a…

MALICIOUS

PDF

32.7 KB Created: 2021-07-06 01:53:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 28ed52aa8950811c05428a168b764454 SHA-1: 8f52b7cd57027be50e416565740021b6be8d4cf9 SHA-256: 80de05e9fc00df6a97de5a92a8f87bccf45ccd5ec5cf822efa74c73792d59a91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators' to lure users. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead users to potentially harmful content or further exploits. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering attack.

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.tw/app/479516143/was-minecraft-ever-free-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/tiktok-free-robux-hack_GM835599320.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/where-to-buy-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-cheat-tool-download-pc_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-hair-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/cheat-roblox-ro-ghoul_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/haktuts-coin-master-free-spin-link_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
font_00_sfnt_off00002d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2A 21960 bytes
SHA-256: cd26e2b34cbd089af42d2e48a12dbf88bec28e1c412962034a8f855f89181b2e
font_01_sfnt_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 18168 bytes
SHA-256: dd30117a17675e2a95f45316c6563603f059e6e4f2122a5e89a28a065fa7a6d6

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