PDF malware analysis — malicious · f73a76881ca88e59

MALICIOUS

PDF

39.0 KB Created: 2021-05-13 08:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: b9c400445428be05eeec6b7b66b4f39d SHA-1: f5e964f971c1ef1329226e4a2d25ca4f8a704a3f SHA-256: f73a76881ca88e594b4ff37dfe96f5e19aba3f7ee59b0979c4bb174f09ec84f2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as malicious redirectors, specifically promoting 'game hacks' and 'generators' for popular games. These links likely lead to websites designed to trick users into downloading further malware or engaging in phishing activities. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 3

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.
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/406889139/coin-master-hack-pro-gamers-game-hack In PDF document text
- https://key8013805.com.tw/upload/files/minecraft-items_GM479516143.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/cm-daily-spins_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-robux-earn_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-gold-cards-hack-2021_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
`stream_003_off00004667.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4667	27060 bytes
SHA-256: `77746af6420ee5743d69c65f16533f260fb5ba8add4f3702cb326bc1315e319f`
`font_01_sfnt_off00008406.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8406	2812 bytes
SHA-256: `fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f`

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