PDF malware analysis — malicious · 4c9ac7ea85b617ec

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 09:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: efb2706c980311dff5c1ed3043dbe1f7 SHA-1: ee8c01932340b29de6b54cc515ba45fc1fe38b04 SHA-256: 4c9ac7ea85b617ec828a768ef3ab918e820919fbaa336e26fd74bc8943e69589

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/835599320/free-tiktok-accounts-with-followers-game-hack PDF link annotation
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/robux-cheat-download_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/roblox-but_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/robux-generator_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-hack-roblox-dayz_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/robux-giver_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-level-6-exploits-roblox_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/cheats-for-the-tales-of-the-ranges-cape-on-roblox_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-download-hack-ios_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003201.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3201	21800 bytes
SHA-256: `12c5c5f467132366529d7d0f0d98ea6b61de68e330aa055482d329cd547479df`
`font_01_sfnt_off00006235.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6235	18716 bytes
SHA-256: `6a9e38658570997ed650d3a9da312102177994b9210c10fc3e58eb65253864b9`

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