Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d58e961bc6b34a…

MALICIOUS

PDF

48.5 KB Created: 2021-05-19 08:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc29e3bd2adb1202d44ff0ba35420b51 SHA-1: 736a570293c2331c95b602f9dc3291dad9d22985 SHA-256: b4d58e961bc6b34a63c020e0c8396f1b34235f2a3eb4811edba6e1a97f5f93f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "free generator / game hack" lures. The document body, though partially corrupted, contains text related to Roblox and game hacks, reinforcing the lure. The embedded URLs likely lead to further stages of malware delivery or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-roblox-website-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-official-page_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/cm-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEF 30012 bytes
SHA-256: 2084993180d3c1358aa8d582ac099f7fdb901b434815e2c6d03f2423b93e29b6
font_01_sfnt_off00008db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC4 18372 bytes
SHA-256: 4f49704c3d2016fd3d486e698c5af7a9a5561cf776b84bb9dfcb3ffa887994c7

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