Malicious PDF — malware analysis report

Static analysis result for SHA-256 18588b314847f242…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 14:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8f8dfb964359f5bbadffde857a9e28fb SHA-1: 6f3f2f839db86aaa3eb2a50ac39b4a5bd99afb51 SHA-256: 18588b314847f2426aeb15ae4de4d7a121676e5e4ee12c3973b214223bc54641
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a 'Robux Generator'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a site hosting a secondary payload or exploit. The document body's text and URLs indicate a lure for free in-game currency, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-roblox-card-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-accounts-with-tons-of-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/is-pubg-uc-hack-possible_GM1330123889.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-legit-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-cafe-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-a-free-group-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/site-hack-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-codescom_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_off00002a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2F 23144 bytes
SHA-256: 454eb75ce74b954c1d29e1aba7468376ab16426947298e904eed978444c67426
font_01_sfnt_off00005e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 18824 bytes
SHA-256: 43c37c5681e12f98f0ff91a02fcc5c5f43ff7a205fa731b1220fcdc88032b5a3

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