PDF malware analysis — malicious · 1d0157e4529513d2

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 10:03:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 03903edd0b4e75522eef5a57bc967001 SHA-1: 09afb858ed34a8579d60f92a9ec44ff7c0f62bae SHA-256: 1d0157e4529513d21183bc5c6d63579af16aa45fc403c9f4b26664568f0f2831

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free Robux and game hacks, presenting a fake CAPTCHA to deceive users into clicking a malicious link. The embedded URL, https://netcdn.online/app/431946152/robux-free-gift-card-org-hack-game-hack, is identified as a known malicious redirector. The document's structure and content strongly suggest it's designed to lead users to potentially harmful websites or downloads, likely as part of a phishing or scam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/robux-free-gift-card-org-hack-game-hack In PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_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
`stream_004_off000057b7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x57B7	25920 bytes
SHA-256: `f29855bd7b6a2da880e1a2833ebfeb8261e0278ef7e930da2229319e698587fb`
`font_01_sfnt_off00009429.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9429	19096 bytes
SHA-256: `bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac`

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