Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d481efbe3fce74d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 18:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9c50d8640e62564000484243fef7a52a SHA-1: 7facd68e79bc7a8b30f0874cdf685d08c38b9986 SHA-256: 4d481efbe3fce74decb20f231ef4f57738abb1296f4abf3f7e4bd230ff222616
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically advertising 'free Robux' or 'game hacks'. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document. The primary goal appears to be luring users to potentially malicious sites through deceptive content.

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/431946152/free-robux-com-game-hack In PDF document text
    • http://hilro.co.za/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-34-4-free-download_GM406889139.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
stream_003_off000047c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C5 24648 bytes
SHA-256: 8a2cd9bb7798f42779dba2ddfb72f3a3ecda1987c0a43b6422c84e4cf56ce84f
font_01_sfnt_off000080c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C3 18276 bytes
SHA-256: d7491fe45cc88596c87233a963b6162720bf27c142cea717df16fbc09fa29ea6

Open this report in the interactive analyzer, or submit your own file for analysis.