Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e1377d3773c420…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:49:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 32809d6ae67c6b7661ef8a92fff7be78 SHA-1: 112d69fb16ce86895c2a1f94e45296018a5f9af1 SHA-256: 52e1377d3773c4200517de9db76a830f160d6f887902d02d6147ece5f765f8da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically advertising game hacks and free currency generators. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-high-school-how-to-get-free-gear-game-hack. The document body and heuristics indicate a lure for users seeking in-game advantages, which is a common social engineering tactic to drive traffic to malicious sites. No scripts were extracted, but the presence of malicious redirector links is sufficient evidence of malicious intent.

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/roblox-high-school-how-to-get-free-gear-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-robux-hack-no-download-no-survey-2021-working_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-uncopylocked_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-free-robux-no-human-verification_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_off00003333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3333 22412 bytes
SHA-256: aa7eeb0e88e308b586c8d1e9015ebaf0c3b3e907b7e8991f0f83ba6dddd7bd57
font_01_sfnt_off00006527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 19204 bytes
SHA-256: 68333a451c944ea2d648f2c8ec6e40c09067cf271cd12c46bf1c87ace88821dc

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