Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e83551e9b119e42…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 14:41:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16591f055a43bc87b6be783ad18c29fe SHA-1: 9f1104f03da5823e65cd848b2291d90cd0e8d8f4 SHA-256: 8e83551e9b119e42682795c87d22b532370ba4efe5a1973071a5290bc7b22b9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is likely used to deliver a second-stage payload or phish for credentials.

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/479516143/how-can-i-get-minecraft-for-free-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-hoody_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/admin-hack-roblox-script_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-ban-people-on-roblox-without-cheat-engine-commands_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-project-pokemon-cheats_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-mega-matar-gente-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hack-on-tablet_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-codes-for-roblox-nfl-2_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-shirt-promo-code-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-a-free-2021-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-20210-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-outfits-2021_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_off000030f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F0 22900 bytes
SHA-256: 70039e7f42555786281c4d7d3aaa0c7e0c8726b00d364b96df2880f8bbb94541
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 18164 bytes
SHA-256: 36a344aed73ba195317bf2b716a0c6b93324dc902034352b776dceb9555a192f

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