PDF malware analysis — malicious · b1bdf9659fd40952

MALICIOUS

PDF

37.4 KB Created: 2021-07-03 22:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 94bccd658cefd3739e453798330e6575 SHA-1: 5533023b7684d2703173e93dfc32f93639e7bd2a SHA-256: b1bdf9659fd40952645406c8ff4489674b256b0d614f89aa992848d5eefd18b8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising "game hacks" and "free robux". The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-no-human-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites. The ML classifier also flagged this as highly suspicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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-hack-no-human-verification-game-hack In PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/admin-for-roblox-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/mode-de-hack-sur-roblox-bee-sarwn-simulator_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/user-hack-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/hacks-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-roblox-phantom-forces-money-script_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-roblox-hacks-for-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/master-coins-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-fling-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-admin-commands-hack-download_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/lumber-tycoon-2-roblox-hacks_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003a91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3A91	23260 bytes
SHA-256: `d436f603eeeb4755827dae1233b55c05df6c4956335d0f4b448c388428379e12`
`font_01_sfnt_off00006ef2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EF2	18540 bytes
SHA-256: `be7925905a3cbe2c3ec6c08efd648bb1fac1fd605dc94fa0f28581d8b5cb9fcb`

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