Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1005001fda6468…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 05:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08cae08a036af93a6f697ccd1848a79d SHA-1: 61b92742876db93f8280c0b0d41b7516c264f392 SHA-256: 6d1005001fda64682e60171b1b7da84465c8125f9afc26645e2f417d08ab3fde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure further supports a malicious intent. The primary goal appears to be redirecting users to potentially harmful websites.

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/blogspot-coin-master-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-jan-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-become-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hack-roblox-download-pc_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hacks-land-com-roblox_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-the-dump-work-at-a-pizza-place-money-hacks_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hilton-hotels-hack-roblox-vermilion_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-gainer-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-free-body-blocky_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-com_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_002_off00002e35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E35 23044 bytes
SHA-256: 593a2fb97c6b58c9b4afb69be26019823dffedc3155b422c4b1b75e05ce5e9bc
font_01_sfnt_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 18300 bytes
SHA-256: 40f16c618a4a1297161766cb49630bde315cdefb1dfc8ebde5bfeb3ff96f8827

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