PDF malware analysis — malicious · 393bf7117bfe1d7a

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 10:51:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 699abc4e4bd68a2a5d252d3142fa4834 SHA-1: eea36f3df06c56064b23531a27887d3f3261052d SHA-256: 393bf7117bfe1d7a4a0e5b45a52154601885f28c0a4dc1f501be651c6eda362c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on them, promising free game currency or hacks. One primary link, http://netcdn.co/app/431946152/get-2021-robux-free-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a scam aimed at tricking users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/get-2021-robux-free-game-hack In PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/robux-websites-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-generator-no-download-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/aplicacion-de-hacks-para-pc-en-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/the-labirynth-free-vip-server-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/games-that-can-get-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-spins-coin-master-october-13-2021_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
`font_00_sfnt_off000030a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A9	23004 bytes
SHA-256: `7889e0bc3432f6e09514fe07052969f9bf60be17ddfcf6934478f51f90eb77ca`
`font_01_sfnt_off00006413.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6413	19224 bytes
SHA-256: `360adf4800d69ebb10572c14b4da5419c5dfdf2532747118a461d6c69179d592`

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