PDF malware analysis — malicious · 42d4c1f78f08b5c7

MALICIOUS

PDF

34.4 KB Created: 2021-06-17 19:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 5c4075f5baeaeecd38ea36caed56f04a SHA-1: 2713d2144fbb3d94cb275e1a619753914951a9bf SHA-256: 42d4c1f78f08b5c7267df07010565a9468a664e2f95cfbae98a1d6f7e9ad3159

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's structure and embedded links are indicative of a social engineering attack.

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.co/app/431946152/how-to-get-free-robux-for-doing-nothing-game-hack In PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/group-free-robux_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/best-roblox-free-model-animations_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-jet-free_GM431946152.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_off000030aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AA	21852 bytes
SHA-256: `62de5fbb21f35314e0a1d874226dfbb4165b39ca98f84d565b7e6bd08acecc70`
`font_01_sfnt_off000060be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60BE	19252 bytes
SHA-256: `62f208162ed747c732d3e7f9fc8f800d4ef6ce7ba50fee32be10ec7d56524450`

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