PDF malware analysis — malicious · 3b7fe073c7a49a74

MALICIOUS

PDF

46.7 KB Created: 2021-05-12 05:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 465f064bdd17797d9ba6981f4d4396af SHA-1: 845cf67d51a97f274ed945a677beeb909e56bcb2 SHA-256: 3b7fe073c7a49a74e9234e68eabfdc2cc983c1f38bd323ca238a2d09b1116c89

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links, presented as game hacks and verification prompts, designed to trick users into clicking them. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'SE_FAKE_CAPTCHA' suggests a deceptive user interface. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-verification-game-hack, which likely serves as a gateway to malicious content or malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 6

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.
PDF links to a 'free generator / game hack' redirector high 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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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
External URI info PDF_URI

PDF contains an external URL action
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/roblox-verification-game-hack PDF link annotation
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-roblox-followers_GM431946152.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/rewards-robux_GM431946152.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/weird-roblox_GM431946152.pdfIn PDF document text
- https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004e60.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E60	25592 bytes
SHA-256: `e80d686916177ed4c97362c75a354712affe4c7a1e4a1c3c917e6c307fb9408d`
`font_01_sfnt_off00008a29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A29	2812 bytes
SHA-256: `fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f`
`font_02_sfnt_off000093ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93CA	18372 bytes
SHA-256: `8e16c624761c7815a00ee9013e3827e71f8aa93179f7b81ef6a1eeeaa97f0eaa`

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