PDF malware analysis — malicious · d75b35282ba57cd6

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 10:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 1efb3640d0cbb866a401711aae0340ca SHA-1: 0340210dacad9fd42edc7770ca5e863addd94830 SHA-256: d75b35282ba57cd65cfa248665ec0f9fb88c229de163636df32487b2101fc012

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-without-offers-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites, likely for further payload delivery or credential harvesting.

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-without-offers-game-hack In PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/logiciel-de-cheat-roblox_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/play-roblox-free-online-without-downloading_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/hoow-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-roblox-sweatshirt_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-no-survey-no-verification-no-download_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-hack-version-free-download_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-hack-2021-aout_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/fly-hack-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/dominus-roblox-free-code_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_off00003409.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3409	22748 bytes
SHA-256: `d17c212afedf10a101119bb23b329df21e1f63841e21f39a61dd23684e602a48`
`font_01_sfnt_off000066ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66EA	19468 bytes
SHA-256: `d293dc8b17a4ec261e56b386a82f7f63f23481516d807023c0ef4741d16fdc92`

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