PDF malware analysis — malicious · 97d9fe2220e21e6c

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 05:36:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: ce3763ce667f543db9829a8a1f714c21 SHA-1: e114f379adefbf273752772a1f4f81e00f0d4d6f SHA-256: 97d9fe2220e21e6c1385e3827ee5568ea6c4419026406a9ee7821fa0cdc7d615

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of free game items and hacks to entice users. It contains multiple links to redirector domains, such as http://netcdn.tw/app/431946152/free-roblox-gift-card-codes-game-hack, which likely serve further malicious content or lead to phishing sites. The ML classifier also strongly indicated maliciousness.

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/431946152/free-roblox-gift-card-codes-game-hack In PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-money-hack-restaurant-tycoon_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-free-outfits-avatar-girls_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/catalogo-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-tiktok-fans-without-verification_GM835599320.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-inspect-code-2021_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-hacking-tool-prank_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/natural-disasters-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-diamonds-in-roblox-royale-high_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-cafe-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-pet-simulator-free-game-passes_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-app-real_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_off0000319e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x319E	22272 bytes
SHA-256: `4d8d5139d88a837e75d3e5fc59aa260445e8a83f6de958fbf5f99f28443ee182`
`font_01_sfnt_off000062e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62E3	19048 bytes
SHA-256: `7d328b4ff7aebfbc9819c9e51d9566e0005dc59142d74411f46393e6d3b0cbb0`

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