PDF malware analysis — malicious · 4ce6f48f5b7ee382

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 01:36:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 449107b8b6bca49cb6a53cde76199856 SHA-1: 9ad49d4e9ca0d634f943596b562e801e5885c402 SHA-256: 4ce6f48f5b7ee3824ff642669585324dfe7d9776c538da96ae115d787d4a66ce

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an invoice-themed lure. 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 0.9971

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.
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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/479516143/minecraft-launcher-free-game-hack PDF link annotation
- http://ellobo.com.ua/ckfinder/userfiles/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/wurst-minecraft_GM479516143.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-java-free_GM479516143.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.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_003_off00004d2f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D2F	25004 bytes
SHA-256: `8723426aa398ac2db31f2978ed5a9679dd82a954885630d6d1a8573e7f7f5a72`
`font_01_sfnt_off000085d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85D3	17872 bytes
SHA-256: `d837b145e961d25029e35f3a46fce907c35d402980f977a4958a38d6468d5501`

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