PDF malware analysis — malicious · bb85cd8dbe74a780

MALICIOUS

PDF

48.4 KB Created: 2021-05-16 23:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 889f1252afe8b94dbb6fdb5e9791475e SHA-1: a25236421606853d5dd1238705816dcab099662e SHA-256: bb85cd8dbe74a7802d573c6eb27c99b70bb854ea7d48f50076a0659e7ef85ec2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, directing users to sites offering "free Robux" or "free spins" under the guise of generators or downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a call-to-action button further supports a deceptive intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 4

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.
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/free-robux-generator-2021-no-human-verification-or-survey-game-hack PDF link annotation
- http://akvamaster.com.ua/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/free-links-coin-master_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
- http://akvamaster.com.ua/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://akvamaster.com.ua/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
- http://akvamaster.com.ua/images/free-spins-on-coin-master-hack_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_off000049b7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49B7	27572 bytes
SHA-256: `51c1d486a385c1ba629dd47db39bc99c7797ae227e83ca42b3d0863a27274c2e`
`font_01_sfnt_off00008a67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A67	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off0000970f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x970F	19556 bytes
SHA-256: `76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0`

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