Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac9d3e947c19e17…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 18:53:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 74a4d07a834d5f2e91c755a92b08d78f SHA-1: b321d3720d00fdbf6ebcb24e38b0516016e4d9ec SHA-256: 5ac9d3e947c19e17795a49d7b56c952d4a1fabe3a928a0844b87bec5db9bf557
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and other PDF files, masquerading as game hacks and cheats. The primary lure is the URL http://netcdn.tw/app/406889139/coin-master-free-coins-link-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially malicious content.

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/406889139/coin-master-free-coins-link-game-hack In PDF document text
    • https://7gking.tw/upload/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-fly-hacks-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-ornaments-horrific-housing-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-roblox-toy-codes-unused_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-radio-script-pastebin-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/install-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-hack-download-app_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-not-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-hack-generator-2021-no-download-and-survey-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-scripts-free_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
font_00_sfnt_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22612 bytes
SHA-256: a834d8f625c7f4c0e3fffb14052b05cb713391252fbdbc2a48620cae9c5135fd
font_01_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 18168 bytes
SHA-256: 7e3864b359ae4e20f98f554aea3d5366a72fce57ca0fb6405be6acd76bdcbaac

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