Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03cf94eb9e6e270…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 05:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de45bdf8d41bde0c7793b475dacd2af7 SHA-1: 05f6e700b0434c81431cdc9589a7faaf475d2150 SHA-256: d03cf94eb9e6e270bb60ee8b49abea2da9ce80c1a0678a9ed2d4c29047c75da8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "robux generators" to lure users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/gain-robux-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/working-robux-hack-without-a-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-no-survey_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_004_off00004e5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5C 25704 bytes
SHA-256: c7b8a05d41b7ed3d233dcded75eb040f4de0c2b0c6f74dcf2fc94c025de51340
font_01_sfnt_off00008a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0B 18200 bytes
SHA-256: 43fcfc5ad65bddb23c39a51770cc0f9a79752509534f161ef5bee49844d3e761

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