Malicious PDF — malware analysis report

Static analysis result for SHA-256 7801daed588abb21…

MALICIOUS

PDF

44.5 KB Created: 2021-06-07 03:49:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af06832c1454e73ef6e8b421ce55bd59 SHA-1: 3bb5220ed6d4764aff3d3497edb4232c26e25663 SHA-256: 7801daed588abb216d90c175dd626727cfd26d2cece834bcefb2b18fb0bc70dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to game hacks and free currency, designed to redirect users to malicious infrastructure. The primary redirector URL is https://netcdn.tw/app/431946152/roblox-free-robux-code-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-free-robux-code-2021-game-hack In PDF document text
    • http://tileworld.com.au/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/pubg-uc-india-price_GM1330123889.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-on-coin-master_GM406889139.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
stream_004_off00004f77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F77 25812 bytes
SHA-256: 7cd47797974b4f1244afefbfbb4952147e41e8a60053ad3a49a6fd16d672a90c
font_01_sfnt_off000089f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F9 18664 bytes
SHA-256: 244e11b8223df12d306a925be81d105c6fd34bd2addebe182ca2288cd6a8a13c

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