PDF malware analysis — malicious · 965ebf299faee965

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 07:46:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: eb1a873def68394facc6031b4515fb80 SHA-1: 2c5ae9ec8643525594283f9765ba018654b3c72e SHA-256: 965ebf299faee9653957ad0f7385077b04680e6fa7d88ebe832cb727d0ac448a

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a fake CAPTCHA and a call-to-action button, impersonating Facebook to trick users into clicking a malicious link. The link, https://netcdn.online/app/431946152/bubbles-hack-roblox-game-hack, is presented as a way to get game cheats, which is a common lure for credential phishing or malware distribution. The PDF also hosts a large number of SEO-linked PDFs, suggesting a link farm designed to drive traffic to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.
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
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/bubbles-hack-roblox-game-hack.
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.online/app/431946152/bubbles-hack-roblox-game-hack PDF link annotation
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/instant-robux_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/why-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-hacks_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-scam_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-websites-that-work_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
`font_00_sfnt_off00005397.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5397	25928 bytes
SHA-256: `a7da9f588c1288f3392272a91e8ce1edfdb6db434272acc27813ab43d280cb63`
`font_01_sfnt_off00008ee6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EE6	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off000098d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98D1	18320 bytes
SHA-256: `31cda485faff670264b09c7fc1f20eccc35a5d7c3a725c1775a8012369ef6c8d`

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