Malicious PDF — malware analysis report

Static analysis result for SHA-256 927d5ff1ee762d65…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 11:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e294485f9d1ad0429ff44c100c564de SHA-1: a6d1a8fab9255083f6d9e5c989fd10a58f7e2c0d SHA-256: 927d5ff1ee762d6563276d5817d8b9532fd9520aedc93b018d229073b61553a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free generators" to lure victims. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-daily-gifts-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirection workflow, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-daily-gifts-game-hack In PDF document text
    • https://brainpads.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/roblox-rape-hack_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_003_off000048a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A4 24452 bytes
SHA-256: 47611c2282ba5e6bb6423f0a26f11b9f76a01b9504cd6b6f996e3acdc1bfcac4
font_01_sfnt_off000080dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DD 17968 bytes
SHA-256: 3c9bdffe1bb3a943d6f9365688f023e1626517f8d36d87a47424220bad3ebefc

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