Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b20ad34b4fb92f5…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 19:50:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42121c610ac9914f58a77df7fdcaf89c SHA-1: 3f8dec18e56194cf8e0f70928097dffe3ce26f81 SHA-256: 5b20ad34b4fb92f595d310b3ccbe362ad8acf3efc79db2ed548703dbf17d009c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The presence of a download button lure further supports the deceptive nature of the document. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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/simplysarc-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-fly-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/pubg-uc-uk_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-do-you-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-ability-spam-dq-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-a-server-without-getting-kicked-out-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-roblox-accountts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-5x-coins-anime-cross-hack_GM431946152.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_off00003232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3232 23088 bytes
SHA-256: 4e13ce56416c1ecb62934609a08a76b13bbc037168255c6c052bc89549f2269a
font_01_sfnt_off000065ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AE 18440 bytes
SHA-256: 7c23f3e3d318805df684302eb3460a013bc43601185b4b54a2bf1903bd620144

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