Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a25f909e41c691…

MALICIOUS

PDF

50.2 KB Created: 2021-05-15 08:17:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91220c84154273ff82a47307d21b7928 SHA-1: 2f62b69499c05b4c3408dfe2e4151ea8d22b401f SHA-256: 55a25f909e41c6911403f8d0915884857f0d1c5b712bed1e85955645e505b74a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, which is designed to lure users with promises of free in-game items. The presence of a 'download button' heuristic further supports the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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.xyz/app/431946152/roblox-free-skin-game-hack In PDF document text
    • https://ceranique.nl/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/wurst_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/claim-roblox_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004832.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4832 27628 bytes
SHA-256: d85bd827cd8f308a13ec6b474c30c284d09bcaecbcb27325e715caaac91e40c8
font_01_sfnt_off000086b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off0000904b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904B 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_03_sfnt_off0000a1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BC 18236 bytes
SHA-256: fe5c379a651f4809ca818f9833677e51b0108f9913a81e91a720280e66b9d385

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