Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfa8527993decdb…

MALICIOUS

PDF

38.1 KB Created: 2021-07-08 13:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 10486eb1dc97d13c4aa14a457d0245e0 SHA-1: 6c1e8861422c4e8ea60f46465a1e8497a1586720 SHA-256: fcfa8527993decdbe7e70c110a349b0cec2eb2e1a6d2983f09f0453fef57021a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of malicious redirectors and the lure suggest an attempt to exploit users into downloading further malware or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-robux-exe-game-hack In PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-ww2-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/inject-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/meep-city-free-plus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-treadmills-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_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_off00003ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EA6 22612 bytes
SHA-256: 847e66aa6ad6d4d5a60a53ef603d2ca6a22eea77d5778e72ce7ff787fe842859
font_01_sfnt_off0000713f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 18716 bytes
SHA-256: d879526d17834eef7ec53fa1f2e94fc6027c3862d934ab81bb2be8c7d2c4e18b

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