PDF malware analysis — malicious · 74864e7abffafe7c

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 00:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 28802973d704bceecab7df927f5bd6d1 SHA-1: e19992f600975334366a9ed3c9a8472e53eb0dad SHA-256: 74864e7abffafe7c43bccf903a7976c923699f4b89c23f9235fa704664ebfd7a

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure using fake offers for game items and a fake CAPTCHA to trick users into clicking these links. The primary malicious link identified is https://netcdn.xyz/app/406889139/free-spins-on-coin-master-app-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to exploit user interaction.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.
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
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/406889139/free-spins-on-coin-master-app-game-hack In PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-client-download_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-free-items_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
- https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-hacked-version-download_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
`stream_003_off00004f08.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F08	25016 bytes
SHA-256: `aa204c13d2e7f2d4a4731dfde3ae0496afac16c26d1f9317398dc36c861a1137`
`font_01_sfnt_off00008782.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8782	17884 bytes
SHA-256: `e35eb77d1e434a4a4433bf7d50e70c108b9e33857f20e35365727ea7a7255123`

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