PDF malware analysis — malicious · 63dd6dedb4d16262

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 20:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 694855568f7e9e4026ed2b549e06fe6a SHA-1: e15fd7cfc8d6e01fe311f284665f00bbf71e1408 SHA-256: 63dd6dedb4d1626206b4890164bacc827aab7b6a958f51994b61ed1c1574eb29

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and currency generators. The primary lure is a link to 'hack-card-collection-coin-master-game-hack', which is hosted on a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/hack-card-collection-coin-master-game-hack In PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-codes_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-link_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/hack-coin-master-online-without-human-verification_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_off00004a85.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A85	26040 bytes
SHA-256: `a35c7014092a731b94b7d3cc750b82887228c1a138e11091f51ced6c83a1db89`
`font_01_sfnt_off000084dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84DD	17964 bytes
SHA-256: `98f8530e6ad966606d275a875844091aa6ee01ba2a7d6c4e2ba80f09f845ae47`

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