PDF malware analysis — malicious · 9b81ecc9d0260399

MALICIOUS

PDF

49.5 KB Created: 2021-05-31 07:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 438d1cde8a87dfbca20b2f54939840d4 SHA-1: 0500a742c055ff12cb3865bb4ea467727121f598 SHA-256: 9b81ecc9d0260399fe342bd62acd8541ad861f8ce551a2f34d7b025409c6ace5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to malicious redirector infrastructure. The primary link, https://netcdn.xyz/app/431946152/how-to-get-robux-for-free-2021-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.8293

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 https://netcdn.xyz/app/431946152/how-to-get-robux-for-free-2021-game-hack In PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-link_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-pc-free_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-gift-card_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-scam_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-100-robux_GM431946152.pdfIn PDF document text
- https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-link-today_GM406889139.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.

Filename	Kind	Source	Size
`stream_003_off00005b02.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5B02	25548 bytes
SHA-256: `38ff6e40a4da200c990b3c524eafde3df041316a49e9bbf20acc4e59f9e8c70f`
`font_01_sfnt_off0000935d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x935D	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00009d0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D0F	18684 bytes
SHA-256: `65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06`

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