Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb87239e1d5f4b1…

MALICIOUS

PDF

43.6 KB Created: 2021-05-15 04:35:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4f3a0ae2b41bd1f3f339465df350fbe3 SHA-1: b7611a4aa3712187d00121bdc3bde4c01ffb75df SHA-256: 2bb87239e1d5f4b1acc02e5c152572e44e99060293981d298dc559b7aea54922
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful websites. The ML classifier also flagged this PDF with high confidence.

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/free-spins-coin-master-november-2021-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-comcom_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-generator_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
stream_003_off00004ca4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 24968 bytes
SHA-256: f187dd223484833f0e9e0b7c8a3f85a390cd61bc9acd1196b07b74f346b77388
font_01_sfnt_off0000868a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 18820 bytes
SHA-256: 51030d0b126b89f1cc2c8ab05e6528d79dc2725cd6845144c535f360e3c6c899

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