Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9be16bd13679380…

MALICIOUS

PDF

33.2 KB Created: 2021-06-29 21:22:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88d51392fb38f984fe66d553382ff8e4 SHA-1: d2c87f74fab948cea6d21e010e28b9cfe5074df1 SHA-256: b9be16bd13679380b9c0ccce33e7f6d88d78a4d1193a218da7082a4b28fad441
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'Roblox Blob Simolator 2 Hack' and a direct link to a known malicious redirector. This indicates a phishing attempt to trick users into visiting malicious websites, likely for credential harvesting or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/roblox-blob-simolator-2-hack-game-hack In PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/best-games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-catalog-free-wings_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-tower-defence-hacks_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-works-in-an-hour_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-roblox-group-members_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/best-roblox-free-model-animations_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-creepy-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/6x6x6-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-does-free-follower-game-real_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-no-generator-no-survey_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_off00002a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1A 22432 bytes
SHA-256: 4153d4709b3ae0c1bcb20053461b8506a51699472d09f9a11bda536c9018913b
font_01_sfnt_off00005c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49 19264 bytes
SHA-256: fecb67106631293973b4b6ff6159b70ee313f5b4903b9897714ffc0d1abd85ae

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