Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda7b94231f35c0b…

MALICIOUS

PDF

47.8 KB Created: 2021-06-04 09:50:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4088fdac2094f73cbc4f111f5feaa394 SHA-1: 9fac5c8799c95b6a80f11a186d47fe0fcef257d8 SHA-256: fda7b94231f35c0be46437ee94e57564d09da5c9a20f47c2cb6e9b6b48bec4a6
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically disguised as game-related content like 'free generator' or 'game hack'. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-backgrounds-its-free-game-hack. The presence of a visual download button lure further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/roblox-backgrounds-its-free-game-hack In PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-rules_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C5 24652 bytes
SHA-256: 7df43c7f1cc815034ef483f62146e0e9091aecac81e5819be64609cfb7b232ce
font_01_sfnt_off00008c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C32 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000095d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D3 19052 bytes
SHA-256: f96a819017bbdbe0a3dc3a3add6e7748c4959c1a4cb4d1b5eca381303a0094fc