Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b70e792cd16aab…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 13:23:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a84b486de4d37257f87c6f9dd91ec297 SHA-1: 45c3b9a35a325b51054dd16777345a105cb04569 SHA-256: f1b70e792cd16aab0bcf383373a4a0bb228677adb9b7878e7ecb6e8603b63095
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to a known malicious domain, masquerading as a 'free Robux game hack'. The document body and heuristics indicate a lure to trick users into visiting this site. While no scripts were explicitly extracted, the nature of the redirect and the lure suggests an attempt to lead the user to a malicious payload or phishing site.

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/claimrbx-free-robux-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/super-super-happy-face-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/snippet-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-knvies-in-assassin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-free-no-survey-real-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-not-for-sale-roblox-templates_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-explot_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-link_GM406889139.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
font_00_sfnt_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22364 bytes
SHA-256: 1808a0008f9d8417025e2d6eafce3d25702c91a3a14a98b4c00e7b685081ee23
font_01_sfnt_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 19168 bytes
SHA-256: 7bf764ce28968fdb785bb336023e4079e63a9f6de2364164f85b44d41da13fd4

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