PDF malware analysis — malicious · 3a3b2ac690a58537

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 12:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: be7b615dcd44522af50b091e0c4eb48f SHA-1: 7b6238f1b27f0e1ec4934d81afa98f8a34983a48 SHA-256: 3a3b2ac690a58537e96e1fab2025a04dd7828a4c2534bf08c9ba5d4ed0011d59

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free in-game currency, such as 'roblox-robux-hack-generator-no-survey-2021'. One critical heuristic identified a link to a known malicious redirector at http://netcdn.tw/app/431946152/hacked-roblox-game-game-hack. The presence of a visual download button further suggests a malicious workflow aimed at tricking users into downloading unwanted content.

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.tw/app/431946152/hacked-roblox-game-game-hack In PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/roblox-robux-hack-generator-no-survey-2021_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/conseguir-robux-gratis-hack-inspeccionar_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/app-master_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/hacks-para-roblox-robux-gratis_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-hack-in-roblox-games-2021_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/redeem-hack-roblox-2021-robux_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/wurst-download_GM479516143.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/roblox-tycoon-money-hack_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-gems-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-codes-and-free-roblox-promo-codes-2021_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_off000034c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34C1	22304 bytes
SHA-256: `0e22606c6046dc8e2efd240c19ace0830409f6ab6876b6682d6363f4a03f1b3d`
`font_01_sfnt_off0000662f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x662F	19092 bytes
SHA-256: `e06e2496ecc1c3d364978b7a8e0823831cb090cb55aacb01fa8d052e2f05e4c6`

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