Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8fcab2d1b30260…

MALICIOUS

PDF

45.5 KB Created: 2021-06-02 05:48:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 386a8664b7b09c98850f95d32e37e52f SHA-1: 2afdd584c0fb5a688eac7c7edb597e1e6df0e281 SHA-256: 1a8fcab2d1b30260b358f969aa4e4447eab21f033feabb55f41e8b9f98cf8e19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-hack-without-verification-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/coin-master-hack-without-verification-2021-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-gift_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-qr-codes-2021_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/daily-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
stream_004_off0000511c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511C 26612 bytes
SHA-256: 9a2894cfbd9c751a334e2039733bf90056b20dd0806ad8020b1671833b3804ee
font_01_sfnt_off00008de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE2 18756 bytes
SHA-256: 1f8069b8e373c1677ee696ae61803aee5e0941708a1ef93a03d88c08535d6ef3

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