PDF malware analysis — malicious · 3718d14b49683b83

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 01:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 6533cd1959e9104e4c4db6b67843bcc7 SHA-1: 8092237f823edcc1f155e56ca0f132a03f83e7d7 SHA-256: 3718d14b49683b8360cce6119afc6dd7d6032e4cbd162211179457b1b383bcae

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/free-robux-mod-game-hack In PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/robux-free-online_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
- http://gabrielprogramador.com.br/alfaleiloes/upload/files/google-play-coin-master-free-spins_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_off00004ca3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CA3	25652 bytes
SHA-256: `c5bb8e849d7ae704869552a095db5871ab7ca0f1f1aacf7b27d01ca43d4f2589`
`font_01_sfnt_off00008881.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8881	18384 bytes
SHA-256: `1a22b4d0ddd13aadfbc34487f46de63ded67addff296de1d1ab8eef84ffc4180`

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