PDF malware analysis — malicious · 3272bca9243ac947

MALICIOUS

PDF

42.7 KB Created: 2021-06-03 14:59:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 3aa16d94d182ed2fc01d4d4989028429 SHA-1: a18f80e0a0451b966022baae3b19a218a2dd8bc8 SHA-256: 3272bca9243ac9479c2f3a072e295d1f06743802890baa8d5e5d021163886ffb

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a lure for game hacks and free currency, which is a common social engineering tactic. It embeds a URL that is flagged as a malicious redirector, likely leading to further malicious content or malware download. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/free-coins-and-spins-in-coin-master-game-hack In PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-video_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-reddit_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hack-a-game_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-education-edition_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
`stream_004_off00004e07.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E07	24216 bytes
SHA-256: `042584098f4833dbbfd3e10f13d9e359a127d254f7fbe83a395ae44266795e10`
`font_01_sfnt_off00008516.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8516	18060 bytes
SHA-256: `1b3bc7270dc207897a9e5e1a55cf6ed9cf064fa4c4c77d14f396411fde3b81d9`

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