Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b60bbbd42f5820c…

MALICIOUS

PDF

37.3 KB Created: 2021-07-19 15:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0175ececc0649ed26ac28c1e73270e47 SHA-1: 1d453237ebb194190e990ae1807a27b189f32e92 SHA-256: 6b60bbbd42f5820cadea96b7362dc5e3f0c71c87a898b1ac17642a7e7fe4ada1
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 http://netcdn.tw/app/406889139/coin-master-free-spins-promo-code-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to exploit user interest in free game items to lead them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9216

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.tw/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_002_off00002f57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F57 23772 bytes
SHA-256: 9653f1d13f664244d488de600eddc1bb2ecc77d260ea81ef9d5caf5ace3db3ba
font_01_sfnt_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00006f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1A 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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