Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf407c12ecb4b720…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 22:36:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf99f4484d65d56bf95e1f988b01ae8f SHA-1: 8f934c4005e70907917412e24a378c4dfd277987 SHA-256: bf407c12ecb4b720acedecd352ca766bcc7a5270a2e4de465b293ac7f91d9d0d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-free-cards-hack-game-hack, are designed to lead users to potentially harmful content. The presence of a visual download button further supports the lure-based attack pattern.

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-cards-hack-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/20210-pubg-uc-in-indian-rupees_GM1330123889.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-dna-hack-generator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/gameblox-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-in-roblox-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off00003799.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3799 22576 bytes
SHA-256: 0268819f2b68852a5a756fb668dfb21b035aafdb805f563542f1f929c5feaddf
font_01_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 18340 bytes
SHA-256: 46bbcb93cdf3c0d295b315ab7e658e4bf46b20485efcdd5d2b69d88a805ee664

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