PDF malware analysis — malicious · 5ece047b2e2840ce

MALICIOUS

PDF

46.0 KB Created: 2021-05-14 14:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 160fa1f880285c003a28364e9a94a050 SHA-1: efa9be29d4b2f5867a5176f0f15e7b2c05185e75 SHA-256: 5ece047b2e2840ce5ce06dbe11dbd971560512d26a54bef85675eea4fb63a527

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that displays a fake CAPTCHA to trick users into clicking a link. The embedded URI and multiple other URLs point to external resources, likely for downloading a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

Heuristics 4

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/406889139/coin-master-free-spins-promo-code-game-hack PDF link annotation
- http://bildhauerei-roerig.de/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-roblox-account-generator_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/113-hacked-client_GM479516143.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/roblox-robux_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-robux-stream_GM431946152.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/moon-active-games_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
- http://bildhauerei-roerig.de/images/codes-to-get-free-robux_GM431946152.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_off00004f77.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F77	24520 bytes
SHA-256: `d5670aa9f533ed79c890cc48c34a7dc12e8e3618fae845e7b3b28833b9bad636`
`font_01_sfnt_off00008745.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8745	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000090f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90F7	18476 bytes
SHA-256: `dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a`

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