Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b3711b033b8a65…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 00:53:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 44f2cac8198ccd828efd7bae4832a50b SHA-1: c8aea4e9da5a6eb481931e2d9451e040340959b3 SHA-256: 75b3711b033b8a658103ff70d6f2dadcbf314ab3c3612c3429002dedb9c73be0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and game hacks. The document body and embedded URLs strongly suggest a social engineering lure to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic firings indicate malicious redirection and a lure for game-related exploits.

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/431946152/free-robux-by-watching-ads-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-any-roblox-acount_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/pokemon-go-free-candy-cheat_GM1094591345.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/gold-chain-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-wikihow_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-client_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/jailbreak-roblox-hack_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
font_00_sfnt_off00002d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D43 21948 bytes
SHA-256: 97cc4b527c50beed8422a167284f8e61c7ad99f6255784f3523308b432ea8298
font_01_sfnt_off00005dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCE 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87

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