PDF malware analysis — malicious · ce399997c757d223

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 19:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: df49837ee67025a75c9e01749e985b67 SHA-1: 4a0f5abfa9d0d00a5e453927af1f0378a5162c61 SHA-256: ce399997c757d2237896cb33e3c5d4065e04c4cd3901da0684db01427b554054

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular online games. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a lure-based attack. The document body, though partially obfuscated, contains URLs that align with the heuristic findings.

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-mod-game-hack In PDF document text
- http://mountain.mn/uploads/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- http://mountain.mn/uploads/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
- http://mountain.mn/uploads/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/roblox-robuxfor-free_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/tiktok-free-fans-cheat_GM835599320.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/robux-hack-html_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-roblox-catalog-items-2021_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
- http://mountain.mn/uploads/files/free-catalog-maker-roblox_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
- http://mountain.mn/uploads/files/minecraft-hacks-wurst_GM479516143.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_off0000344c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x344C	22516 bytes
SHA-256: `388e6d8d4165c76abf28ca4371c7762cd64a058a8874295ec50c067e7fe90861`
`font_01_sfnt_off00006693.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6693	18180 bytes
SHA-256: `ec137eb2004e83444d05fb4d1e1b75aa4a0bc16b796b44a7b6f5e0d56e626e81`

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