Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcdadfc880a1a32…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 15:55:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5cd1a706678980deb02fab47f7c59519 SHA-1: ac9c0e5e2d2a3e1fac7e52dba7f72f73081664ea SHA-256: adcdadfc880a1a3286cabd18da489b9748ae6039a7f3f763bc8da507b7c12ad8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/minecraft-alt-accounts-free-game-hack. This link is presented as a lure for game hacks and free generators, indicating a social engineering attempt to drive traffic to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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/minecraft-alt-accounts-free-game-hack In PDF document text
    • https://planetzoe.hr/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-shirts-in-roblox-catlog_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-server-discord_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/future-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-hack-website-no-download_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-free-wiki-item_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/can-roblox-games-be-hacked_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/hack-de-robux-en-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22588 bytes
SHA-256: 92b156a9c4776b0956fe8bff17080d2e4f99c773db2dc1308a6c453d508ba4bd
font_01_sfnt_off0000623d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623D 18212 bytes
SHA-256: 79167943b664c57080b7558835257354cfd56d5428e37e62e961791e2f613c27

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