PDF malware analysis — malicious · f3ce99696e7f1eaa

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 20:52:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: dfa6cf1c370805de7a6696021bcf7c88 SHA-1: ea7bf29972d497b6b258162091558fa82dce492e SHA-256: f3ce99696e7f1eaa227cb632d0ee6d61c0b668b29612992fd940b68fa3c52cee

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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 http://netcdn.co/app/431946152/free-roblox-credit-cards-game-hack PDF link annotation
- https://www.nara.org.uk/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-hack-a-roblox-account-with-brutus_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-noob-shirt-free-shipping_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-island-royale-aimbot-hack_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-item-hack-t-shirt_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-hack-2021-real_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/robux-gainer_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/rc7-free-download-roblox_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-tycoon-roblox_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/elysian-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/play-coin-master-online-free_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
`font_00_sfnt_off00002ef2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EF2	22072 bytes
SHA-256: `ab358a4aab2a541b3081528925592c1d2177096c809b8eb88629e06f80cb4a59`
`font_01_sfnt_off00005fb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB6	19048 bytes
SHA-256: `11fa34f02ae2b2c79cee6c754472cc49030845364f99d88cd550251bc59efe9e`

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