Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3091a9a6b171c46…

MALICIOUS

PDF

47.9 KB Created: 2021-05-13 02:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a0ac2fc57fd1f0f76ca0037bb1261164 SHA-1: 5e10c5bc664c6ac95e43e78c4942972e7034ef3f SHA-256: b3091a9a6b171c4611e9d6540bec961d18ba00f79d9665dad4bd71ac385abd24
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 free game hacks and generators. The primary lure appears to be 'Robux Com Free', directing users to `https://netcdn.xyz/app/431946152/robux-com-free-game-hack`. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or trick users into navigating to malicious sites, likely leading to further malware downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/robux-com-free-game-hack In PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/fighting-free-card-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ace.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACE 27584 bytes
SHA-256: 56cc59916e0cf4bb4c1d8e67180d2d1327c64211dcdc40725990bc58ef84e850
font_01_sfnt_off000088d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D5 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off00009912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9912 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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