PDF malware analysis — malicious · 99760ba26fd7d287

MALICIOUS

PDF

33.5 KB Created: 2021-06-26 20:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 168327d1a49fca95273f2e82fc3ae54c SHA-1: eea778fabbef297e1330d5e5d12343b8ff76ac5b SHA-256: 99760ba26fd7d2872f394a3fa13c6c017e81ae95baf12212c15e548d8328162e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links disguised as offers for free game items and hacks, such as 'Get Free Robux Add Codes'. One critical heuristic identified a link to known malicious redirector infrastructure at http://netcdn.co/app/431946152/get-free-robux-add-codes-game-hack. The document body and heuristics indicate a social engineering lure to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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-free-robux-add-codes-game-hack In PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-do-you-change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/hacks-master-coin_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-all-gamepasses-for-free-script_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-robux-easy-no-download-2021_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/robux-redeem_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/cm-spins_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/wurst-115-2_GM479516143.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-games-with-gamespasses-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
- https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-free-blogspot_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_off00002c77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C77	22364 bytes
SHA-256: `159f50da92b325be8a15e523cfb3fca61c50f550bf11f4d3e8e3f9c7d2ce581b`
`font_01_sfnt_off00005e4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E4F	18996 bytes
SHA-256: `74f013746f3072c14a1f9b267643807fb4408c13795b3945d489d15c957d5e4c`

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